‘Nick From Home’ #91 - Exotic P: Easton & Ingalls

well good morning everybody welcome to the backyard here in ellensburg washington usa the local time is 8 48 in the morning and we will begin our program on the eastern cascade foothills what at the top of the hour at nine o'clock 12 minutes from now thank you for joining us i continue to get comments and emails about how the first 15 minutes is a waste of time don't start until you're ready to talk about geology well obviously you don't get what we're doing here you're maybe unable to understand what we're doing here but the part where you have to send me messages and suggestions on how i can improve come on so do you know what i mean by you can skip ahead 12 minutes get your granddaughter to help you you can you can scrub ahead well you don't have to watch this part but for a majority of us we like to connect and make sure everything's good we want to say hi to each other okay my goodness if you were with us last time we were talking about green rocks with a special guest star chris mattenson and we will use i had a couple moments of inspiration last night and early this morning so switched up the plan a little bit and we will be using chris's knowledge this morning so essentially there's more green rocks this morning but they're tied specifically to two of the exotic terrains one of them brand new to us so are we functional muffler boy uh hello sharon and steve from milwaukee oregon uh hello patrick age seven the jurassic coast united kingdom yuki and sabre and finland good morning good evening another finland great to see you guys the finns are here marlboro massachusetts we are five by five david thank you for that philadelphia checking in phoenix arizona blodgett oregon portland oregon green lake that's in the seattle area good morning red hat over there uh yep yep yep ralph got got those rocks from you ralph thank you i um i just looked at those so i'm hanging on to those till december and got your uh email as well kyle from virginia another united kingdom oh the breeze is picking up on a very raw morning austria hello richard from vienna that sounds delightful this time of year without ever having been sean is in maryland michigan bill from portland one of the regulars collagero what up homey switzerland okay salmo bc i've got a few thank yous let's get on it looks like we're looks like we're doing okay okay a few thank yous scrub ahead scrub ahead from australia from brisbane australia from kathy there's something called the australian i can't read it backwards research and space exploration arse or as kathy has helped me understand pronounced in an australian way ah us thank you kathy so that package crossed the pacific this one crossed the atlantic it's from london do you remember i don't know a couple weeks ago was it that we talked about karen sigloch and mitch mahalanik and and we'll come back to those concepts by the way there was a reason yeah we'll come back to it but i i talked about i didn't know there was an actual bound atlas of the underworld i thought it was just a website so this is full of geophysics my god i've come a long way baby uh but there's great stuff in here and liz you had a note yes uh i thought you'd make better use of this than i ever could after watching episode l uh the author was a member of my local geology group at the time it was published he gave us a talk on it really good and donated some copies of this book so this is if you're wanting to so that's the author apparently or at least the editor so this person was in uh liz's geology group so i bought one and i cannot really make sense of it i don't know if i can either liz i've watched all your live streams since past st patrick's day and uh i am london liz and i live in uh ruislip r-u-i-s-l-i-p nice thing thank you london liz brisbane kathy and london liz i think somebody sent this i couldn't find a no couldn't find a note or anything so if this really came from a viewer instead of just some random textbook company that got my home address thank you thank you if it's from you a viewer thank you i've got a few other gifts that i'm going to hang on to because i'm going to use them in some of our sessions later this month and into next month but i do have one more it's a letter written in cursive which doesn't happen that much anymore like front letter from my mother from sheila and dave and chalfont pennsylvania and it's a five page letter i'll just give you a couple pieces of it dear fellow badger so one of them or both of them went to the university of wisconsin as i did here is a gift inspired by two of your youtube episodes about bing crosby and the sunset highway i don't know did you see those i did one in the spring with the live stream and then there's one on youtube from a few years ago we'd like you to listen to one of these records in particular from monday on see if you come to the same conclusion as we did this song was likely inspired by the monday morning trek down the sunset highway to seattle and beyond we noticed that the song was written by crosby and rinker again you'll have to go back and watch that if if you don't know what we're talking about we hadn't focused on that before but rather considered this take to be the grand slam of several takes of this song over a two-week period our focus was rather was on bix's performance it's simply stunning big spiderbeck very famous in the jazz world okay uh sheila has five grandkids i have two sheila has three sons i have okay uh dave is a fellow badger having graduated from uw madison in 1962 in economics next got an accounting uw milwaukee in 64. finally okay so thank you to you guys so they sent a record like what like a cd or like a some sort audio file no they sent the record like i i almost should have gloves on for this bix uh uh well bix biter beck and bing crosby and al rinker i think for a time was their their after leaving spokane washington and driving from washington down to seattle in 1927 uh pretty quickly they got hooked up with paul whiteman who's a very famous jazz orchestra and it's like oh that's cute they actually sent you the the record player holder from the 20s or the 30s or whatever that's a collector's item probably amazing well they sent their records too these things are heavy if you're of a certain vintage you've never seen a vinyl record actually if you're young and hip the vinyl is back apparently what do i know but back in the day even into the 1970s when i was listening to a lot of music and buying a lot of music it was all on vinyl record albums but i don't know is this a 33 and a third this isn't a 78 is it i don't even really know what i'm talking about now but my pet foxtrot paul whiteman featuring bix forget me not also a fox trot recorded april 22nd 1928. wow 78 i see okay these are old 78s so thank you dave and sheila i think it was um i don't know i'll have to figure out how to play these i don't exactly have uh a record player in the basement that will play these but i'll i'll figure it out i'll go up to the music library and get my mask on and have a bar uh have a party so thank you for your very kind gift it's nine o'clock give me a minute would you it's overcast here we got muffler boy coming down the street and um get my head right for just 30 seconds and we'll be good but i'm gonna check one more time we okay it's overcast the sun's trying to come through but i'm not going to move everything we're good doug lorraine good i'll i'll see you in 30 seconds hot mike a little brisk for bijou but let's see if he wants to come out hi did you want to come outside no he's actually asleep in the kitchen getting some more hot water what are we talking about today right the damn breeze is picking up that is a sour breeze well good morning everybody thank you for joining us for this session on the eastern cascade foothills and you're like boy i don't think i even know what we're talking about today well guess what i didn't either so here's a little tell if there's a super bland title for a session that means that it was a few days ahead of time and i didn't really know what i was going to be doing so i just came up with something generic and as recently as yesterday afternoon i wasn't exactly sure what we were going to do i'd been working on a couple of new maps that i'm going to unveil this morning using colored pencils by patrick yeah so i had a kind of a working plan not only for today but for the next few shows we're kind of at that point um but i had a couple moments of inspiration last night and early this morning and so i'm i'm excited to share what i have in my brain at the moment with you and of course we learn together so i'm learning at the last minute just as well as as you or hopefully as well as you so by now this is a familiar looking map and we really haven't added much to it in the last few sessions last time you recall we didn't talk about exotic terrains at all per se we talked about green metamorphic rocks and igneous rocks that give us some very specific clues to what was going on out in the ocean at some point in the past we're going to use that valuable information that chris mattinson shared with us and i had to watch the replay and slow it down and repeat it a couple times you know as we're filming i'm like kind of like half listening and half like worried about the technology you know and everything else and shadows and mics and so i had to kind of really you know concentrate and listen to what chris was had a lot of information for us and to me digestible i hope to you as well it seemed like from the comments you really did enjoy uh what chris had for us uh so we're gonna use some of chris's content again today but we're going to apply it to the map so you're like well this you're not going to talk about this whole thing again of course not no i'm not going to go through this all again but just a reminder that we did back in october work our way across british columbia quinella cash creeks to kenya yellow is alexander and orange is rengelia and so these big beautiful fat long exotic terrains in british columbia at least at this pass seem pretty digestible and we did just a little bit down in oregon and california and realized that there is some evidence not everybody is convinced but many are seeing that there's pieces of these blue guys for instance and even some grello cash creek sandwiched in between down in the klamaths of oregon and california we're not but in december we're going to be cruising all over the place but here in november we're staying here in washington so if you've got good eyes oh my god is that all we're doing today those two little things is that just one thing no there's a couple things here there's two different shades of green so yeah that's all we're that's all we're adding to this map these two little guys right there so why am i spending a whole program on two little fragments of things that barely matter in the grand scheme of things well a it's more green rocks and we'll pretty much be done talking about green rocks after today and two it's within a day's drive of this backyard in fact it's within an hour's drive these exotic terrains today are as close as we will get to this backyard and so i have a little bit more experience with these two terrains than i do anything else because they're so close and yet embarrassingly i hardly knew anything about them until you know this summer so we have extra cozy fort today because i've got four field reports all coming from wah that's french in the last few weeks and regular viewers of the channel have seen these but i'm going to grab little scraps of things and i had something that was unlisted that i made public again and i'll share that as well i also have more stunning photographs from gary and you're like i don't know who that is gary from darlington i can't believe it when i hold it up and show it to you get the reflection off of it so this is a beautiful gift from gary and i've gotten more information from gary by email and gary's been emailing me a bunch more photos with his hopefully famous now yellow labels in fact he even has this photo for us that was my gift with yellow labels on it now that we're learning some of these rock units and exotic terrains so i'm reminding you first of all that gary gave me a wonderful gift but more importantly i'm reminding you that we're going to just continue to use gary's work in many of these sessions including today so there's a there's a lot of visual component to today so let's get into it uh yeah we'll do it this way this isn't going to cut it we'll keep using this map but we're kind of done with this map to be honest we're never going to color this stuff because it's buried by flood basalts we're never going to cover a few other areas because of the basin and range extension and some other things we'll add a few more colors but the scale is wrong for us because the next handful of sessions i don't know six seven eight sessions i'm not really sure let's say half a dozen are all going to be in this area and we are going to color these areas and i've got the color scheme kind of figured out organized by weekend etc but we need another map don't we we need a map that's more specific can we enlarge this area here you kind of saw this coming didn't you i kind of had this in the back of my mind can we enlarge this area here and make a rectangle and can we start adding colors this way and magnify and really dig in to something i've always called the hornet's nest because it's too complicated to comprehend well i'm trying with this session so here it is and you're like okay great so my point is we're going to color this session by session and i do have a couple colors on this which i'm going to get in a second but this is our i don't know i need another name for this this isn't mappy mcmap this is just a more kind of focused version of just the north cascades but there's obviously some heavy black lines which are significant faults some with black teeth on them which is a thrust fault and then there's some finer scale black lines as well those are boundaries between terrains and we know that all these exotic terrains have faults bounding them so even these thinner black lines are faults some significant faults but i'm choosing to grab a few of these faults and highlight them magnify them so that we can use them properly okay so you want today's colors the colors have to be green if we're talking about more green rocks right if we're talking about more green rocks we need green for our exotic terrains today right i got all the rocks here from from friday afternoon okay drum roll please the north cascades map oh hold it hold it hold it right there now those look like familiar colors that's royal blue grello and stacenya so before i i'm really a tease this morning aren't i so before i reveal what we're doing today please notice that the northern edge of our north cascades map is what i just shared with you royal blue cornelia cash creek to kenya right in there you see them i'm out of hands but you can see it right there's the southern tip of cache creek with the town of cache creek british columbia by the way there's in red now cc the town of cache creek in the town of kamloops and this is the trans-canadian highway highway one cache creek comes down heading towards hope british columbia and then we pull back aha okay so let me just freeze the frame for a second give you a chance to soak this in there are some familiar colors like what part of this map is familiar from recent work that we've done like this is old news to us now that was three weeks ago or whatever but isn't this familiar let me remind you well actually no i'm sorry let me go back and just kind of give you more detail so i'm leaving british columbia because i have barely colored much up there yet i will be here's the international boundary canada and the usa the red is geography can i read this backwards this is highway 20 washington state route 20 from burlington uh up and over the north north cross highway marble mount over to eastern washington as we approach white uh washington pass and rainy paths winthrop and then on to eastern washington and the okanogans over here i understand if you're watching from austria this isn't making sense but you know you know the drill we're doing local stuff and i'm hoping you can enjoy the excitement of learning this stuff together here's interstate 5 burlington everett everett this is u.s highway 2 up and over stevens pass leavenworth wenatchee and then highway 2 heading over towards john stockton's house interstate 90 north bend stopped to buy some cheap nikes up and over snoqualmie pass cleolum washington and my town ellensburg before you head on to the east all right so by the end of this series by by mid-december we're going to have colors for all these guys and the complication of course is there's so much going on it's such a complicated part of the story that i've never really had it straight in my head i get so confused and i'm not alone it doesn't matter how much experience you have in geology it's a confusing well i mean look at this thing uh-huh north cascades oh really oh yeah it's super simple what did somebody just throw up on this thing and after eating m m's i had another one i wanted to show you i can't find it but it's it's a mess so i mean depending on your point of view it's a fun mess it's a challenge so we're gonna work on this together and i feel like i need it feels like i'm building slowly this morning i don't mean to do that to you but i also feel like we're going to be in the zone here for a while with this map so this is our first crack at it and i want to make sure you see what the plan is the plan is to pick key bedrock units that we can follow easily and a few features that we can use as piercing points we'll get into it and then ultimately we'll use some of these bedrock units that we focus on here in washington and use them more regionally i'll i'll explain that in december so this it looks should look familiar to you this is from burlington on on us 20 or washington state route 20. and do you recall what this is for instance this is the twin sisters dunnite have you been there no talking to me this is the nook sack i was gonna put mount baker on here i forgot mount baker stands right in the middle of this purple area what was yellow that was the chilliwack stuff right the alex part of the alexander story coming through the arctic and the green if you recall was the eastern metamorphic suite or the eastern terrain and it's green so we are going to be talking about the easton again today i can't hold it let's go ahead if we jump across this fault and that's our first major topic today i'm going to talk about the fault first before we talk about details in the rocks but i feel like i need to kind of hook you a little bit more is there any of this eastern terrain on the other side of this crazy straight fault and the answer is yes so this light green patrick patrick here are the four colors i've picked so far for the terrains on our map and your pencils are so fancy like this is ma they all have names this is malachite i hereby declare that from this point on the eastern metamorphic suite is called the eastern terrain is called is colored malachite and i hereby declare that moss green a different shade of green is our new terrain today it's called the ingalls terrain and i had no plans on talking about the ingles today until uh last night about six o'clock so the ingles and the easton are chock full of green rocks that chris was talking about last time and that is our topic today if i had to do it over again i'd call this session easton and ingles but whatever we're just calling it eastern cascade foothills that'll have to do this is the map i wanted to show you again it's there's lots going on so using the colors that we just had i already forgot the name of it what is it malachite malachite for the eastern terrain there's the easton again it's popping up in a place called the kachis lake inlier i'll explain we're going to go there in the cozy fort notice there's a little bit of yellow a little window of chilliwack peeking through in this little window i won't really talk about it but it that there so in other words this this story the bedrock the exotic terrain bedrock surrounding uh active mount baker our topic a week ago uh here are the same rocks down here near cleoelum washington isn't that wild and obviously they are separated by miles we'll talk about it in a second so you can see the malachite or the eastern terrain in the cachis lake in lyre something called the hicks butte inlier just south of kalielum i mean this is a half an hour drive for me half an hour in the freeway from ellensburg to clellam then another half an hour on some dusty dirt roads to get up into the hicks butte and i'm there within an hour i can get to these rocks and there's even a little teeny part of the eastern terrain and something called the monashtash inlier now hardcore fans know that there's one more in liar the rimrock in lyre that's uh east that's west of yakima the rim rocking liar i haven't put it on yet because i don't know what to do with it and i've been emailing bob miller and daryl cowan andy miner and others and uh i think i need to email a few more people i need to get as much as i can about the rim rocks i thought maybe i'd talk about all of these inliers today i've decided not to i'm just going to talk about the easton on this side of the straight creek fault and then we'll leave the rim rock for another day but here in moss green is the ingalls exotic terrain now there's green rocks in the ingles there's green rocks in the eastern let's cut to it my gut says cut to it this is the main message of today 20 minutes in this is the main message we're talking about the eastern terrain which is familiar to us from a week ago and we're talking about the ingalls terrain which is unfamiliar to us but it will be familiar to us by the end of this show and even though there's mostly green rocks in both of these terrains they are telling a very different story in other words the green rocks can tell us two very different stories and i'm not going to try to connect these two at all i'm not going to say that the ingalls was forming next to the east end and i'm not but i do want to stress that the ingles you just kind of keep this in the back of your mind especially as we go to the cozy fort i suppose you'll be sick of me talking about it by the end of this session but ingalls stuff is from an ocean floor that's it it's an some kind of ocean floor somewhere and the ophiolite suite that chris was talking about last time are on display again beautiful so there's serpentonite there's sheeted dikes there's pillow lavas there's some argolite and i'll talk about those in a second but the message is the ingalls terrain is a part of an ocean floor for sure more than a hundred million years ago and the eastern terrain which is already familiar to us because we were up around mount baker you recall with the frozen pizza boxes and the thrust sheets the naps remember one of those frozen one of those pizza boxes was the easton like a hat without a head but notice these are different rocks these are phyllites famously the darington phillipide greenshist the shucks and greenshist and the shucks and blueshist so we're going to find these close to my house even though there's a more regional story okay so this is we're going to keep coming back to this concept okay i think i need to do what right so before we talk more about the details of the rocks the green rocks and those two exotic terrains i already gave you the main message and before we kind of talk a little bit more about what we know about the kind of environment that those rocks are representing although again i already kind of uh kind of revealed it so i think two and three are going to be quick again but number one is going to take us a little time because obviously there's something we've got to address what is this thing what's it called what happened why are there the eastern rocks here and the more eastern rocks here why are they so distant from each other i've been waiting to do this so you know i have my fruitcake from dereth and the fruitcake that was mailed to me from dereth uh in madison wisconsin from this bakery in texas is the analogy we've been using for this entire collection of exotic terrains everything west of the craton essentially and i've only got one green thing left and this is the moment oh and this is the moment so you know that our fruitcake is representing this collage of different pieces of stuff this red guy got got sliced in half i didn't even realize they did that but to demonstrate the straight creek fault which is called the fraser fault is it fraser or frazier i'm not from canada i want to call it frasier but i don't think it's pronounced that is it so you know what i'm going to do i'm going to cut this green thing i'm going to cut this easton metamorphic suite i don't know can i do it while you're watching without it falling how do i want to do this i'll do it like yeah i'll do it like that daddy should have brought a bigger knife why didn't daddy bring a bigger knife daddy dumb sometimes okay now i'm not saying the the eastern terrain is just a thin little sliver like this although it might be now that i think about it but what i do want to show you is that once upon a time as recently as 50 million years ago hang on hang on patrick so before i demonstrate this and before i go more into the straight creek fraser fault remember that our time window of discussion here is 200 to 50. we're building the fruitcake aren't we we're building the fruitcake between 250 million years ago we're bringing up bringing the ingles terrain we're going to bring in the eastern terrain we're going to bring in the chilliwack we're going to bring in all those guys cornelius to kenya you got it alexander rangela everybody's coming in during this time window but for the first time since we started this series i'm going to talk about something that's happening starting 50 and ending 35. you're like what i thought we were going to be in here the whole time well we're building the fruitcake we're assembling the fruitcake during this 200-50 but this straight creek fraser fault is cutting and then moving one piece of the fruitcake past another are you with me when are we going to move the green rocks apart from each other and the answer is between 50 and 35 do you have it 50 to 35. and we'll have to revisit later on why we know the thing stopped 50 uh well why we know it started 50 and why we know that it stopped offsetting the green rocks 35 that'll have to wait i'll say it now i'll say the stop part now no no no let's just let's just finish the thought okay so as recently as 50 million years ago the eastern terrain let's just focus on the easton the eastern terrain is together and it's been sitting here as a coherent uh green eastern terrain for at least 50 million years been sitting here as a coherent green thing for 50 million years but starting 50 million years ago we're going to cut it with the knife like we just did oh boy and we're going to have earthquakes on the straight creeks i'm just going to say straight creek from now on sorry canadians okay we're gonna we're gonna offset on the straight creek fault 20 feet at a time earthquake and of course i'm showing you a strike slip fault the part that i'm moving that i'm shifting north 20 feet every time we have an earthquake yes it's just like the san andreas fought in california but this was the active strike slip fault between 50 and 35 million years ago the san andreas fault today in california is much younger than 35. it it started 20 million years ago so please don't be confused i'm not talking about the san andreas fault but i'm talking about the straight creek fault that is behaving exactly like today's san andreas fault and every time we have an earthquake on this straight creek or fraser fault i can't hold it we're going to get the eastern terrain separated more and more each time what does it look like today the pistachio green easton is up here even part of it across the border in canada and here's more of that eastern terrain down here there's no easton over here there's no easton over here this is a clean break and if we truly want to talk about the north cascades we have to restore the straight creek fault do you know what i mean by restore like this is today i'm showing you the map today right and i just told you the dates that this green stuff and this green stuff got more and more far apart from each other terrible grammar i'll do it one more time hmm oh i was like this right 50 million years ago 40 million years ago 35 million years ago and then we stopped and it hasn't moved an inch since there's reasons for that but that's not for our series this fall and yes we know it stopped 35 million years ago because a blob of magma invaded this whole fruitcake from below straddling the straight creek fault and that magma called the chilliwack baffleth by the way no relation to the chilliwack exotic terrain is 35 million years old and that cello whack magma has not been offset at all so i just quickly verbally showed you or told you why we're sure that the straight creek has not been active in the last 35 million years one last thing for us to worry about but just in case you're struggling with visualizing this because of course the ingles is on one side moss green is the angles where's the angles on the other side [Music] not there so when we restore the straight creek fault much of this exotic terrain stuff here and this is not going to match perfectly i'm going to tell you right off the bat this is not going to feel as nice as you want it to feel i'm talking about me too this is not going to be restored as perfectly as i want it to be restored primarily because of structural geology things are folded things are torn by other faults so this is not like the grand canyon where you've got these obvious layers and then you offset them somehow and then if you restore the faults meaning you put the blocks of you put the crustal blocks back together before the faulting you can't see everything line up perfectly that's not the case here as well we're going to restore this right now and you're not going to see ingles on the other side it's not i would have put angles on the map if i had it if i had moss green to show on this side i would do it this is kind of my screen but that's our twin sister's dunnite which is not even really connected to anything here that's still a mystery we still don't even know the age nobody somebody said why didn't you ask chris about the age of the twin sisters done that he doesn't know nobody knows nobody knows chris is a smart guy nobody knows the age of the twin sister's dennis there's nothing to date anyway i'm going to do something with another prop to restore the straight creek fault if you don't know what i'm talking about and we do need a piercing point and i do have a piercing point on this map maybe you already see it and you're like well i don't think i know what a piercing point is well if you were back with this in september we had some setting the table episodes and one was on strike slip faults because i knew we were going to be needing that knowledge let me remind you of what a piercing point is here's what i did in september i took a cereal box special k i have an ego problem apparently because i i use this well maybe i don't because i'm splitting my my head in half which is appropriate but i made the point that my two eyes here are piercingly blue eyes they're not but whatever that's my little trick to help you remember what a piercing point is i have two eyes two piercing blue eyes and conveniently they're right next to each other thank you parents my eyes are across from each other but if we take a utility knife and come right down the middle of my head and we start making earthquakes on a strike slip fault i'm not making mountains at all now i'm not making ridges this is totally horizontal shifting two eyes are our piercing points they used to be together mercifully they no longer are and we can measure the offset excuse me we can measure the offset on the straight creek fault or on any strike slip fault to san andreas take your pick doesn't matter we can measure the offset by measuring the distance on on the tracer fault we're going to measure from here for the chamber to go from here up to here those two those two eyes used to be together they no longer are we can measure the offset you know what the straight creek fault offset is what are the piercing points for the straight creek fault and what is the offset the offset's 100 miles 100 miles now depending on what you read there's slightly different numbers and they're using different piercing points that's a nice round number for me so we're going to use it and i'm not the only one using it by the way 100 miles of total offset now i'm not saying there was an earthquake that caused 100 miles of offset and one fault one earthquake no way but i'm saying after hundreds of i don't know magnitude seven magnitude seven and a half earthquakes on the straight creek slash fraser fault we've got a hundred miles of offset just in case you can't see it the piercing point we're going to use is a thrust fault i realize that some of you are way ahead of me and i'm totally fine with that you're smart we've got a lot of smart people here that tune in every time but you know i like to involve as many of us as we can regardless of our background so sometimes the pace is frustratingly slow but that's you know that by now with me trying to catch everybody so what i'm doing with this cardboard and it is a prop you can maybe guess what i'm about to do with it i need a specific piercing point like this green stuff and this green stuff is kind of like close to each other especially the out at me with one particular map you know as i put these sessions together you know the sources i have it's all these detailed scientific papers which i can barely understand half the time there's these uh books written for the general public by kind of photo books there's the roadside geology series by daryl and marley and marley down in oregon et cetera there's websites there's youtube videos all that stuff i'm trying to use everything and come up with some things that i think resonate with our group and resonate with me as i try to piece this together no pun intended and this is ned brown ned from western washington university this is his book that consuelo gifted me and we're not going back to the san juans but there was one map in here i'm like i've never seen that done that way and ned has been at this for 40 50 years i don't know never met never met ned the colors are wrong for us this is our green mostly right san juans and the frozen pizza boxes and the nap stack and coming over and then we get to the straight creek fault but i'd never seen this is this the right one yeah he says if you look at the windy past thrust and then you look at a similar thrust fault on the other side that's a perfect piercing point i've never seen it done that way and so we're going to use it the piercing point for us this morning with the straight creek fault is this thing and this thing now hang on i know there's no ingles just south of this and i know there's no uh chilliwack and easton this way that's again because we're in three dimensions there's folding of this stuff there's older stuff knuckling up we can't be that greedy but i am saying that we have a major thrust vault with a bunch of green rock south of it and we have the same thrust fault according to ned and others with a bunch of green rock south of it and we're not going to be talking about much more green rock stuff by the way in the north cascades so this works for me i'm excited about it and you know some of the folks who are emailing me regularly who are a long time geologist may say back away from that that's not no i wouldn't do that well maybe they will but sometimes we're making connections that aren't common in the literature and there's a chance that will actually help shape a little bit of future work in the north cascades if i may say so so what am i doing with the prop there are names and we will revisit this the windy past thrust which forms essentially the northern boundary of the ingalls train which we haven't even visited yet but it's coming in a second and the vetter apparently eddie vetter from pearl jam is a geologist the veter thrust which is mostly up in bc but it does cross the border and come towards the san juan islands green rocks to the south of that thrust green rocks to the south of this thrust ned brown says they used to be the same we're going to do it too damn it let's do it let's restore the straight creek fault huh what cardboard like most props do i even need to do it like i think the message is clear but i don't know oh now i'm going all the way up to quinnelia myra so this is today we're restoring the straight creek fault getting it back to the way that it was back in the day those don't match up you know you know you've already heard me we got the easton next door to each other all is right with the world as recently as 50 million years ago this is what the scene was this is the way it is today so any work we are doing in the north cascades especially if we're talking about terrains that straddle the straight creek fault we need to mentally keep doing this i don't know i guess i'll keep this i'll keep adding colors to this why not and we'll keep reminding ourselves that that's one thing we need to do but this faulting happened after the fruitcake was assembled okay i think you've got it by now moving on to the other two acts this will take i think 10 minutes and then we'll go to an extended close report session thank you for your attention going to the folders for the first time wow so yeah that so we were up around mount baker and looking at the easton and the chilliwack and the bell pass and the twin sisters dunnite was somehow within the bell pass here's a cross section i'm reminding you of what we did in the western cascade foothills last sunday and in cross-section i'm reminding you that those pizza boxes are thin naps that are thrust fault bounded please remember that thrust vaults are the result of moving blocks of crust on a low angle fault not a steep fault but this is all review a low angle fault and the hanging wall of a thrust vault gets pushed up the fault plane and i have to squeeze the crust to send these blocks these naps these thrust sheets coming up the back side and the windy pass thrust and the vetter thrust same idea and i'm not going to talk about those because we don't know what the foot wall of those thrust vaults are yet that's coming in sessions down the road but if we get to the actual rocks i'll quickly review what we know about the easton and we'll break new ground finally because you've been patiently waiting for the ingalls rocks even though i told you a little bit about it well here's something i drew for myself this summer before i really knew about the windy pass thrust or the vetter thrust but i'm showing this to you oh good we got power tools going nice hopefully you can't hear it look at this collection of rocks most of them green but there's other stuff that we're ignoring today uh south of cleoelum i'm just showing you the green rock variation in the eastern terrain i swear there's a neighborhood newsletters like here are the times to use power tools sunday mornings 9 30 friday afternoons too god bless them they're out doing wholesome things with their yard trying to improve the neighborhood that's the mature approach so you remember the green rocks look like this the constitution slash lopez terrain in the san juans and there's our age window and there are some of the rocks involved i'm reminding you that the easton one of the two terrains for us today same time window the darrington fill out the shucks and blushes the shucks and green shift and i added this this morning i'm reminding you now that that's all subduction zone rock that chris was helping us understand last time well how about the ingles those are green rocks what was the difference the difference is once we get to the ingalls terrain we're no longer talking about a subduction zone we're talking about rocks within an ophiolite sequence and ophiolites if you hear the word ophelite from this point forward think ocean floor not a trench maybe not even a spreading ridge there's kind of some new ideas to explain ophio lights as chris was discussing with me after we shut the cameras off on friday pretty sure everybody agrees that with an ophiolite sequence you need massive amounts of pulling the crust apart to explain those sheeted dikes and other things like that but the new idea i guess called supra subduction is that even correct i don't i shouldn't even have said it because i'm not sure but the new idea is there's massive amounts of extension in the ocean floor to create an ophiolite sequence but we're not at the actual plate boundary we're not actually at a spreading ridge which was the old idea the new idea with an ophiolite as i understand it from chris and others is that you just have a fracture zone have you ever looked at a map of the ocean floors of the world there's all these offset fractures or fractures that offset there's fractures on the ocean floor big ones and the thought is you kind of exploit one of those fractures and you do massive amounts of extension and you create a bunch of new ocean floor rock out there in the middle of the ocean not necessarily tied to a plate boundary regardless our ingles oh boy our ingles terrain is in the ballpark isn't it it's another postage stamp on these strat columns we can agree a little bit older entirely within the jurassic period but again we're looking at rocks of an ophelite sequence and not rocks of a subduction zone oh i got the wrong page sorry sorry there easton ingles green rocks not the same environment you've got it now all right i feel like i want to go to the cozy fort but before we do what do i have in the third folder here not much i don't think oh yeah just notes for myself reminding myself and then maybe you that the ingalls is this ophelite sequence well i do have something else that's that's important more coming on this in a second but here's our ocean floor and then from chris's work last time and that's why i hit that so hard we started out to remember i said which rocks are from a subduction zone because i really wanted i knew we were talking about the easton today and so i think i saw ivana ivana i don't know i still don't understand your story you're some sort of savant do you have any geology training at all i'm not sure you do you're in brooklyn but i saw you write some comments like wow and i think you heard something from chris that i'm not sure i heard was chris and this is through ivana's interpretation now was chris saying that the blue shifts are more common when you have very old ocean crust which is therefore cold and sinks more easily or fast i don't our blues just more likely to happen with old cold slabs subducting and our green schists more common with younger ocean crust and you're like why would you have ocean crust of different ages well it depends on how far you are okay am i framed up can you see what i'm doing so the idea is and maybe i'm hitting this too hard and it's not really what chris was saying but i'm going to do it anyway here's a spreading ridge a divergent plate boundary out in the ocean somewhere i'm not saying now that we're off the coast of north america i'm just saying generically in the globe on the globe and look at the distance between this spreading ridge and the place where the ocean floor subducts back into the earth and remember from the episode on car and siglock this stuff doesn't go away it continues as a deep slab going all the way to the lower mantle but that's another topic right my point is as this ocean crust gets farther and farther away from the ocean crust maker and that's what this is this is like the mid-atlantic ridge or the east pacific rise it's hot here and we're making hot new rock that's going to cool off but the concept is i think this is backed up with that as this ocean crust gets moved farther and farther away from where it was created it gets colder and colder it's like this is the oven and this slab is getting farther and farther away from the oven until if there's a long travel distance between the creation of the ocean crust and where it gets subducted it's going to be far older and colder than a spreading situation here where the distance between the oven and the subduction zone is shorter therefore we're going to have younger and therefore warmer ocean floor that's going to subduct is there a possible signature on what type of schist is created in the subduction zone because the green shift and the blue shift were originally basalt on the ocean floor okay so ivana if you steered us in that direction and uh chris i hear from chris tomorrow he's like yeah you're right on the mark with that then i'll feel good if chris comes down the hall walking towards me with kind of this look on his face like what are you then then then we were wrong okay the last thing i just remembered that i do know oh boy did it blow away hang on patrick i had a more detailed i really want to show you this so give me another second here it is got it so from reading the comments from chris's show i think uh one of the memorable moments is when chris gave me that um looked down the microscope and we were yeah so here are some actual photo micrographs uh we're back to the easton now this is the subduction zone uh fill lights and green shifts and blue shists and we're about to go in the cozy fort where we'll see a bunch of these rocks in the flesh but if we jump then i know this is confusing if we jump from the easton subduction to the ingalls ocean floor right this is from a good paper by jamie mcdonald i heard from him just a little bit this week by email he's the guy at florida atlantic university i think jamie mcdonald has done a lot of work on these green rocks and other exotic terrain rocks here in washington but this paper in 2008 which is a geological society of america special paper 438 entitled the ingalls ophelic ophiolitic complex ophelite complex we're about to look at real video clips and photos of the details in this ingalls ophiolite complex and i was going to draw this all out on the chalkboard but i thought i'll just i just these are basically my notes and i just colored them up for our use i was running out of time last night i'm going to try to read backwards a majority of the ophelite complex so this is like almost a complete ophiolite sequence meaning almost a complete uh section of the sub-flooring of the pacific ocean floor more than a hundred million years ago the most complete ophiolite complex in washington at least and much of it is this kind of serpentinite which we'll see a bunch of in the cozy fort melange mix is kind of a jumbled mix of blocks and things and there's some ribbon church that are blocked uh kind of incorporated in that some i guess it was jamie interpreting that maybe some of these are blocks of old seamounts remember those huge oceanic plateaus that we were talking about or maybe not that big maybe just a seam out like a regular seam out tied to the yellowstone or the uh like today's hawaiian emperor seamount chain but the point is we have a jumbled mexi wow we have a jumbled mess and a mix of serpentinite and other distinct blocks and you'll get a sense of that chaotic nature of this portion of the ophelite sequence then i remember one of you had a live question for chris on friday saying are there any sheeted dikes in washington and according to jamie's work there are some beautiful sheeted dikes in the ophel in the in the ingalls which is just you know 45 minutes away from here on us 97 north of blew it pass but that didn't come to chris's mind at the moment that's fine some dates some high precision uranium lead dates coming from different portions of the ingalls there's some pillow basalts that are more greenish now than they are the original basalt and then there is some argeolite which is a basically mud that turns into shale which turns into slate which turns into argelite so you just add temperature and pressure keep adding temperature and pressure and you eventually come up with some argolite and that's quote-unquote the top of this ophelite sequence and what does this say oh yeah so at least jamie and maybe others are wondering if you look at the details of the shale in the archer light was there possibly some sort of oceanic island arc nearby at the time so instead of is this ocean floor that's out truly by itself or is this ocean floor that's that's next door to some sort of island ark and if it's an island arc does that mean oh boy green bean string bean stikenia cornelia i'd love to make correlations like that but i also want to be true to the science that's been done to this point i don't want to connect dots that that should not be connected at this point and nobody knows we're about to go into the cozy fort it's the top of the hour ding chime top of the hour i don't know so we're going to burlington hill to look at a couple of video clips and some photos sir pentonite from the easton suite subduction zone thank you steve i took some of that green shift slash blue shift and whacked on it with a hammer this morning that was an interesting experience at uh 35 degree temperatures out here but i wanted to give you a sense of kind of the layered nature i don't know should we flip around you're going to see better photos oh i forgot to i'm going to show you some photos in a second i forgot to remind myself who the photos who sent the photos i'm sorry wow so green schist layered and you'll see a bunch of the you'll see a bunch of the layers momentarily and then the whole reason for doing this before in the cozy fort more green rocks but now can you go can you leave the easton which is subduction can you go to the ingalls which is ocean floor so serpentonite ocean floor not subduction at all as i understand it now that i say that there is serpent tonight with okay anyway the ingles is representing an ocean floor situation and one of the short video clips will feature this guy which i brought home with me that from that day this is a hot day in july but you'll see one of the field reports featuring this guy right here sir pentanite ocean floor okay we're going to start i can't remember i can't remember cozy fort by steve give me a second to get set up please a little power to a boy uh just got him fired up and maybe he heard me complaining i don't know eric i mean neighbor we're all friends we're all friends all right i don't need my hat anymore kathy i'm going into the fort with you guys not exactly warm out and uh i don't know maybe the battery life will uh dictate how how long we go here but i got a lot for you okay thank you for your patience let me mute oh man um we're going to feature photos from gary coming in just a second i've got the email open here so let me read this to you i basically gary the guy that sent me the beautiful uh big photo from the mountains i basically said gary can you tell me more about your history with the u.s forest service i think our viewers might be interested because we're going to continue to feature some of your photos which are amazing gary says thanks for asking for most of the last 30 years of my u.s forest service career i coordinated the trail maintenance and construction program on the mount baker snoqualmie national forest i was fortunate to spend much of my time in the field between mount rainier and canada i was always seeking out opportunities to find funding from various sources to fund improvements and repair work on the trail system on the forest funds would then go into contracts for the work or agreements with third parties to do this my favorite part of the job was plotting and scheming with partner organizations such as washington trails association back country horsemen of washington and many others to leverage work on the trails i was also the lead person on managing the wilderness areas which included working with advocates for new wilderness areas facili and facilitating various projects in the wilderness areas i was fortunate to help out folks from the u.s geological survey and the northwest seismic network on their projects i helped basil tekoff from the university of wisconsin get a permit for work on the twin sisters range have you been there before probably a dozen years ago too anyway something new would come in the door every day nature would throw floods down trees and loose rocks on our way and it was incredibly satisfying work i spent the first 11 seasons of my career in the wilds out of chelan in the 1970s and 80s pretty much out on 10 day back country tours in the wilderness the whole time maintaining trails and many other tasks many fond memories of lake chelan's to hiking holden and everywhere in between okay so thank you for providing that uh personal information gary i hope that you're okay with me uh sharing that but i i think it's nice to have that background so i'll tell you what we're gonna go right to gary's stuff so not exactly foothills right dumb name for these programs for these sessions but this is the photo that gary gifted us and it's on our wall now in the house but hopefully you can see all the amazing landmarks number one but also a few of our featured units in the foreground is the yellow aster nice and that's a very famous nice from northern europe it's part of the chilliwack group we're still over by mount baker i don't know these places very well but again we're looking at the chilliwack part of the alexander story aren't these photos amazing especially if you're watching from a place that's far far away from washington maybe these photos and nothing else will encourage you to come and visit us so as we absorb some of these photos we recognize more and more stuff there's the straight creek fault the scf and the chilliwack we know that that's um yellow on our maps and there's the easton getting up to the top of white chuck mountain mount shuckson is full of green schist in the eastern we don't know about the nascent terrain yet that's coming another look at the nice i think i failed to hammer the idea that the yellow aster is an exciting story part of the alexander story but it's nice it's metamorphic nice i don't think i really got to that part last sunday i was so distracted by the crappy technology oh my god seriously is that scotland is that a chunk of russia is that a chuck of norway in the area surrounding today's mount baker oh my goodness and then skipping to the easton i don't think i have spent much time with the darington fill light and that's where gary lives in darrington but here's our first look at some of the green rocks and you're like that doesn't look green well there'll be some green rocks coming and gary knows that the straight creek fault is a thing so he's helping us realize that when you visit cleoland washington very close to my backyard here that same darrington phillipe part of the eastern terrain is on our side of the fence uh the only reason for this photo now is to show you mount shuksan which looks like a volcano doesn't it but it's not it's blue shift and green shift all the way to the top of that mountain it's not a volcano and never was a volcano that's malachite green according to patrick's pencils that white stuff beautiful shot oh my god gary i'm not sure where you were here but i'm guessing you were in the easton somewhere probably west of the straight creek fault is my guess because that's where a lot of your photos are coming from god that is a beautiful photograph i'm going to be using this one for years to come thank you for today's show we're talking subduction [Music] no no no i gotta back away i gotta back away this is subduction mount pew never heard of it honestly until gary's photos and now i got to go up to mount pew i mean there's we're going to see a lot of this stuff with the video clips i remind you that so far we are ignoring plutons of all shapes and sizes and plutons if you're unaware are blobs of granite essentially that are invading from below we're ignoring all of them because they they screw up the fruitcake so there will be a session at least one session that we're going to look at these plutons but we're really ignoring them now and i hope you'll see why in a bit what okay thank you gary for that now i'm gonna feel bad but i want to show these photos somebody said i was just up at french cabin mountain hang on hang on hang on hang on just going to work lighting wise so i think most of gary's photos were from up here in the green the rest of this morning is on my side of the straight creek fault there's my house here's cleoelum and french cabin mountain is in the green area of the cachies lake in lyre and what else yeah we're just going there and then we're going to go over to the ingles ocean floor subduction zone even though they're side by side today correct no connection between the two i'm trying to stress that as much as i can all right so i'm embarrassed to say oh power tools this is the blue slash green shift of our area in the kichis lake in lyre i'll look up your name and and thank you next show but you take beautiful photographs sir all i remember from your email is you were up there because you saw one of the installments we did and then you found another couple and they were lost and you helped them figure out where they were but this is all at fred's cup fred cabin mountain above cleolam and this is me three years ago after chris mattinson alerted me that jamie mcdonald led a field trip up here and he said you've got to go see it this rock and i think there's volume on this this is a metamorphic rock called green schist you can see why it's a beautiful green rock and there's exposures of this in kittitas county up above lake cleelum on this cold windy rainy slash snowy morning on november 1st how far do we have to look to find the next exposure of this green shift in washington so that's near cleelum washington answer is burlington hill i'm at burlington washington along interstate 5 where state route 20 crosses i-5 i'm almost to bellingham i'm three hours away from home and look at beneath the moss beneath the different botany is our old friend the green chest it's way up here because the straight creek fault is offset this green shift by a hundred miles okay so i used that in uh in a lecture that i did a few years ago and uh always meant to do more with it and here we are so the remaining amount of time we have in the uh so thanks to gary and the unnamed viewer who i will credit next show the rest is ned zinger all the way and i've got four clips um the first starting i'm going to skip around because each of these are more than 30 minutes long and we don't have time for that but there's parts of this that i think will be helpful with our discussion here today so this is these are all found on my youtube channel if you want to watch the whole things this is nick on the fly number seven french cabin blue shist let's start it and then skip ahead to two or two other places howdy and welcome to french cabin mountain here in central washington you know what's up here besides a bunch of trees and beautiful scenery there's a bunch of green chests and blue shist which are metamorphic rocks that tell a very specific story about the early days of washington metamorphic rocks today the eastern metamorphic suite all right and a couple of key gee whiz things about this protection show us some bedrock thanks for joining us this is a place where the blue shist is is in place it has not been moved and yet if we pan over and look carefully at some of the details we'll get our first real close look at some of this there's green there's some blues oh that's good looking good looking stuff okay so if you're curious where this is um oh i should do it now so this is the uh field guide number 49 from the big national geological society of america meeting that was held in seattle in in october of 2017 and this is the main help that i've been using the last three years jamie mcdonald again the guy from florida and there's a whole team of people including bob miller who's part of that research team that i'm involved with starting next summer but much of what i'm sharing with you today is coming from this paper i used our colors and the straight creek fault and we're now down at these inliers and french cabin mountain is here but i actually want to show you the forest service road like a i used the red marker on the back of this so it's bleeding through the other side that was dumb but if you know lake cleolum and lake kachis this is the ridge between cleolam and kachis and forest service road 4308 uh which crosses you get to the north end of lake cleeland get on 4308 and just follow it all the way up all the way up and what's in green here is the easton but here's our little window of chilliwack that should be yellow if i could color it yellow but i'm up here french cabin mountain is up there while i'm at it there's more uh here's caleb washington uh this is forest service road i can't read backwards whatever that number says 45 10 is that what it says so gravel road coming out of south calim and going up and peel point is not the green shift in the blue shift but you can get in look at how much easton is just south of i-90 although the exposure is not particularly great and then i got you here where eventually before i run out of battery on the phone going to the ingles and the ingles this is all in that same article by jamie blewitt pass and us97 if you happen to know the area you're driving right through where it's real gnarly and in snow it's very dangerous on the north side of blewitt on us 97 you're going through serpentinite the whole way and that ophelite sequence okay back to the easton trying to you know grab one other segment here maybe two others you gotta get that out of your all head let me come in let me come in boss french cabin mountain okay you think we can lift it you want me to try no i don't know [Music] oh yeah i missed the spot picking up the greens as well as the blues i have no idea what i'm looking at by the way at the time water girl here oh just kind of on this face how about how close can you get without falling oh oh baby oh baby oh damn sorry patrick ah that brings it to life just add water so the details have been studied here the fabric okay we're leaving the easton that's enough i got three segments from the ingles you know i'm not going to go get the map again moss green ophelite ocean floor just south of the stuart range and i did this one in early july before i bought these wireless mics but i just want to give you a sense of the setting of finding this deep ocean floor in a completely non-oceanic i kind setting wanted to find some weathered stuff for you too i guess we'll start with the fresh looking stuff the sun's out right at the moment sir pentanite so can you notice uh a green color can you notice that it's uh kind of waxy this guy doesn't know what he's talking about so i continued hiking up the trail this is the beverly creek cut myself beverly creek trail south of stuart range we haven't talked about the stewart range yet we haven't that's a pluton we haven't talked about granitic stuff at all yet but uh the scenery is kind of nice and i'm showing you this to give you a sense of how how much of this ingalls is up there it's a lot of green rock that weathers to a very deep orange i had gizmo the wind noise is bad because they didn't have the mics yet but i just want to narrate so i'm hiking up to earl peak from the beverly turnpike side which is kind of the back side so there's i like it up there because there's not as many people typically and so it's fun to see what gizmo can capture number one but number two everything you're looking at is ingalls it's all serpentinite and you're like really that doesn't look green well look look carefully in the foreground can you see that the fresh look of these rocks is green is ocean floor rock but then there's so much iron and other chemistry they didn't understand a lot of that kind of jumbled brownish orangish stuff tannish stuff is uh is also the same rock so we're looking north across to the stewart range but there to the right that's all that's all ingalls it's all serpentanite and you know i'm 58 years old i'm 275. i'm not in nearly the shape that i used to be but this is doable for me so if it's doable for me i think it's probably doable for you this is a this is a after about three hours of hiking it's not it's accessible to many of you beverly earl peak like the name earl e-a-r-l so again i'm calling this the foothills show what am i doing this is not foothills and yet the hills is on display turn the volume back on well this is not bad we'll have the wind whistle for you a little bit brown to green in the foreground sir pentonite stewart range in the backside granite windy past thrust in the distance liz and carter were supposed to meet me up there and they didn't show so there was a miscommunication so i was daddy was pissed when i was filming this tmi how could you be pissed up in a place like that good good question okay we got more almost 10 30. i don't care let me show you that piece that i showed you that i have in the backyard here when i found it on the trail oh no that's not it sorry we're leaving that more ingalls now we're right off of us 97 north of bluet pass if you know that drive north of blewitt on us97 you cross this every frickin time hey folks and welcome this is some very interesting rock here north of bluet pass right along u.s 97 it's kind of a busy place but it's a relatively quiet tuesday morning i think you can see this is rock worth stopping and looking at wouldn't you say this is part of the ingalls exotic terrain another mesozoic terrain another day another postage stamp to look at this mesozoic basement of central washington and this outcrop here i've never stopped at before driven by okay [Music] i get impatient with myself imagine what you must feel like look at how chaotic it is remember we're down in that serpentinite matrix with all those blocks of things it's like a melange i shouldn't say it but i guess i'm going to wasn't the bell pass melange full of dunite and other stuff is there a chant no stop forget i said that ingles ocean floor gizmo shadow still along us 97 let me show you one more segment and then we'll finish horizontal so they've been i'm showing the jamie thing before i colored it to the edge of former north now some of the looks of these these really screwed up rocks pretty interesting engels terrain that was intruded by the stewart granodiorite yep that's coming so just kind of take a look at this and see how grungy it is how much this rock has been beaten up i have no idea what we're looking at here what the h okay the last thing i'm going to show you in the cozy fort and then we'll go to some questions and answers if you still have them um this is the field report template that i was suggesting that other field reporters use and i've received a number of field reports i'm hanging on to most of them until later but this is back to that beverly creek trail uh in early october we'll watch this whole thing it's almost three minutes two minutes and 54 seconds hey everybody this is your field correspondent ned zinger today reporting from the beverly turnpike trail south of mount stewart and the mount stewart batholith i'm sitting in beverly creek it's dry this time of year it's almost october but all of the rocks here are one kind of green ocean rock so everything in this crook bed is green kind of waxy in places okay in marley's book marley and daryl's book uh page 134 here's mount stewart and the stuart range basilisk leavenworth washington is to the north and i'm in this country down here which is a ridge that's not this mount stewart basilisk but instead it's the ingles terrain on the map here's ellensburg blewett pass wrong color for us i'm in the purple here and the pink is distort bathulus i'm kind of off to the map just a little bit but i'm in this purple area that marley's calling the ingalls complex ophelite this is all along right along beverly creek it's such a peaceful place and that whole mountain is full of serpentinite you can see much of it has weathered to the the kind of brown or to the orange two minute geology oh yeah [Music] engel's terrain it's time for some live q a 66 million years ago that was a long session in the cozy fort but hopefully you see the benefit of showing some of those clips hasn't exactly warmed up okay i have 40 battery on the laptop who knows about the phone but i think we're good and i know you'll have suggestions on how to extend my battery but i've already commented on that oh wait i don't have oh i closed our i gotta find our session here hang on by the way i've heard from some of you like i can't find the live link or whatever i can't join you live like i have to i don't know how to do it well i don't know if you're aware but if you hit subscribe to this youtube channel it doesn't cost you any money are you aware of that like you don't have to go get your checkbook or something it's free but the reason you would hit subscribe and then maybe subscribe to two or three other youtube channels that you like is that you can have a a feed of your youtube channels that you subscribe to and as you scroll down your youtube feed you can you can easily find these live links so that's a little a little tip for you okay popping the chat out like a boss let's see what you're interested in wanting to talk about and then we'll call it a day scrolling back i'm looking for some uppercase ivana the savant from brooklyn what does nook set correlate to in bc um i'm going to try to do a little bit with the harrison area ivana but i think i need jerome to help me a little bit and i don't know much more than that but when we go north of that thrust fault that vetter thrust fault i think we're going to find more nook sack related stuff jeff from vinman's bakery you've got to love it everywhere on the earth does green rock always indicate the rock was formed under or with water i think so jeff i can't think of common green rocks that are not an oceanic story i'm guessing i'll get corrected on that by a few but especially here anytime you're out hiking or you have a green rock in your front yard from the previous owner or whatever that's from the ocean patrick age seven is the thrust vault that crosses the straight creek fault still active was it active while the straight creek fault was active is that why some things are covered up at the piercing point patrick age seven thanks for the questions patrick the thrust fault is not active anymore it's difficult to get an age window on the thrusting patrick and in fact all those pizza boxes with all those thrust stacks uh you you notice we haven't spent any time talking about the timing of those pizza boxes thrusting up and the geometry of the naps there's not a coherent story that i can find from the work that's been done so we're just knowing that we have these naps that are stacked up we know there's a thrust vault between each patrick and we don't have a good sense of the timing except now that i say that what wasn't there the message 100 to 84 million years was daryl's darrell collins group with the the pizza boxes thrusting and didn't ned brown's group extend that earlier to like 115 million years until about 85 million years but i don't know how our thrust of today fits into that if it does at all but it's a major feature and i'm going to try to learn more about it thank you patrick dick why are scientists so sure the straight creek fault slipped 20 feet each earthquake when the quakes occurred 50 to 35 million years ago thank you dick that's my choice to present it that way on average when the san andreas fault makes a big earthquake on average there's 20 feet of lateral movement on the san andreas fault in our modern times and as a teacher i'm just trying to give us a sense of 20 feet of movement each time we have an earthquake but we have no way to to document that so it could be there was more than 20 feet of of lateral offset on the straight creek each earthquake or five feet per quake um we don't know that that's just me trying to give a sense of the concept positive power any trace of manganese nodules in the serpentonite could be i don't know kathy ass harry okay now we're talking to each other uh claire says thanks for the most interesting lesson in liverpool i'm still into paul mccartney lately so i'm thinking about liverpool a lot marbles collector was the ingalls formation once an accretionary wedge at a subduction zone yeah i struggle with that thank you the main teaching message was that the ophea light is the main message from the ingalls and that is not a subduction story however i need to learn more about serpentinite that's in a melange i think for now we're not talking about an accretionary wedge at all with the ingles but i may i may back off of that when i learn more i'm trying to decide how much to involve california geology in this series by the way and in december we might be down at the franciscan complex and i might have a different tune so thanks for that catslave56 wants to know about oregon hang with me would you um i don't want to reveal too much i want to kind of keep it kind of a secret not that was dumb way to say that i have a plan in november we're looking at these different terrains here in washington and then december we're going to go back to the entire alaska to mexico scene and try to make some connections so i like that you want to go down to oregon right now and make some connections but i don't think i want to do that quite yet automatic scroll let's do a few more oscar hey san diego thanks for all the help i just ordered those lights what causes the difference in color between blue and green schist i what did chris say is glophane a blue mineral i think it might be and so if there's a bunch of glocophane then it's more blue than it is green so what well glocophane each each metamorphic mineral has a certain temperature and pressure condition that it thrives in i do know that much so as you'd what were the story of those shifts they were low temperature but high pressure i believe so if you just imagine remember that thermometer that chris had but it's more of a pressure thing like in a pressure you keep cranking up the pressure you're going to develop new metamorphic minerals that are adapting to those new pressure conditions so that's one of the uses of looking at all these detailed minerals inside of these rocks because we know through experimentation in modern laboratories exactly what the temperature and pressure conditions are necessary to create that certain mineral so if you see a blue shift with a bunch of glockophane i hope that's right then we know the former low temperature high pressure condition all related to a sub subduction zone ah two more the device nine on the ingles video where you see more greenish color on the far mountain is that less weathered serpentinite and the foreground is reddish weathered stuff if so why is the mountainside more fresh thank you there's a lot of landslides up there so that's one way to expose a i think of it like this i think of if you've got a ridge full of serpentinite which you do at earl peak or longs pass or hiking over to ingles lake if you know any of those places this is the the the kind of secondary ridge just south of ingles creek i know i'm talking locally now but whatever angles longs earl and so on i think of the whole ridge as being made out of green serpentinite and i think of inside of the ridge as truly green i think of the ridge as being made out of this stuff and it is but at the very outside of the ridge where the ridge is exposed to the snow it's snowing up there this morning you alter the green to this orange so the weathered look is the orange well if you have a big landslide if you have some debris flow or if you have i don't know some small fault that makes an earthquake and exposes if you can somehow expose the inside of that green ridge it's going to look green so i think that in a general sense explains why you saw certain faces that were green in the video and some of them were more brown and orange let's find one to finish on we're not going to finish on this but i think you're catching me here mark mark smith says ocean floor serpentinite versus subduction sir pentonite yeah i'm i'm realizing i'm getting caught here the serpentinite is in both situations so i think just in hand sample i don't think you can say well this is cerpentonite from a subduction zone this is sir pentanite from an ocean floor looks like the same stuff but i'm not backing away i'm not backing away from this but i am going to agree with you that that serpentinite is part of a subduction story and i i think i'm just focusing on yes there's cerpentonite in both pictures and the the serpentinite itself looks identical in both pictures but it's the context of where we find this repent tonight is it within a zone of an ophilite sequence or is it in a jumbled mess with the rest of these shifts i guess that's the way to say it but i'm going to continue to think about that thank you i'll toughen up are the shiny surfaces in your hand samples slick and sides i kind of asked that out loud in that ingalls show that nick on the fly right along us 97 and in the literature some of these do have grooves and some of them are interpreted as fault planes so slick and sides are grooved smooth surfaces that represent where you have an actual fault surface fault plane where there were earthquakes recently but in the serpentine and the cerpentonite there's a lot of those surfaces i don't think they're all slick insides last question what stopped the straight creek fault from moving by the time we're done with this show we're gonna we're gonna finish with a bang episode z episode zed will be an event at 50 million years ago that's going to help explain why the straight creek fault began and why it stopped cliffhanger a toast to you here's to the green schist slash blue schist of the french cabin creek area between lake liyelum and lake kachise here's to you and your health not only today not only the past week but weeks to come here's to the health of your family and your friends and everyone in your life that is important to you and even people who are not important to you here's to strangers is it possible this is the second show in a row that we didn't have major technical problems is it possible me saying that right now means that i will have problems next friday i don't know there goes my wife she thought we were done for sure we're not done but we are now thank you for tuning in i love you we'll see you next friday at 2 p.m pacific time what's the topic i don't know but i'll figure it out by then have a good week we'll see you on friday goodbye

Channel: Nick Zentner

Views: 12,080

Rating: 4.9773049 out of 5

Keywords: Nick From Home, Nick Zentner, Ingalls Tectonic Complex, Exotic Terranes, Easton Metamorphic Suite

Id: URtNdXMS6ww

Length: 121min 21sec (7281 seconds)

Published: Sun Nov 08 2020