Exotic M - San Juan Islands

well everybody how's everybody doing the local time is 1 46 p.m on a friday afternoon here a very windy friday afternoon and we will begin our program on the san juan islands at the top of the hour less than 15 minutes from now thanks for joining us today our discussion today 2 p.m pacific time here on the west coast of north america you may not know where the san juan islands are if you're watching from a distant place but we'll fill you in and then if you come back on sunday morning 9 a.m pacific time and we change our clocks here in the united states so we fall back an hour but i'll see you at 9 o'clock sunday morning going to the foothills of the cascades the western cascade foothills are we functional garrett the dutch night owl great to see you hey you know who i heard from this week by email yesterday gnarly normally emailed me from itchyboots.com that was the thrill but it's a thrill to see you too old salty oso john says it's very good uh california david yes i'm seeing where you are and uh if we're five by five et cetera greece hello ontario canada the everglades the mettau newport oregon port orford oregon boise idaho edmonton canada darington washington hello gary the united kingdom and tennessee and alberta nobody's telling us about our smoke detectors and the batteries in our smoke detectors hello nobody daddy's here paul's from burlington kingston ferry you're on the ferry right now that's cool david's in edinburgh scotland jean's in los angeles stephen's in portsmouth uk and still raining there squim washington anacortes sharon your neighborhood today agassi british columbia tarot is from finland stephen from everett carol from paris illinois frederick saskatoon london hello jerry jodie's from hello oh she's just saying hello bavaria great to see you i love the people from distant lands especially frankville nova scotia i love everybody but i mean it's always a thrill rotterdam chico california happy valley oregon it uh it's howling here it's 30 mile an hour winds and the cold front is pushing through but kind of under the shed roof here and kind of protect it oh god hey man i got thank yous why am i screwing around with this i can't keep up as usual and this embarrassment of riches so consuelo thank you for uh consuelo in seattle sent me a book that i didn't know about ned brown from bellingham washington we're going to talk about ned a fair amount today uh she sent me this book a couple weeks ago and i've used it quite a bit consuelo for this lecture so very helpful very timely thank you for that speaking of books jim in prineville oregon jim says uh yeah i found these at a book sale maybe you can use them says jim down in prineville and he says be careful with this one it's from the 1960s what did you say it was printed in 1966 it's trying to come apart geology and introduction to principles of physical and historical geology thank you jim and a separate package from jim more books now i'm a clearing house patrick this is for you from jim in prineville thank you jim but wait there's more on the door early this morning huge box left outside the house from eric and jay in bakersfield california ia and inside of that huge box are three of these like freezer bag kind of things with zippers on them oh god am i i don't have time for you bishop's here i don't have time uh dear nick jay and i have been watching your classes since march we want to thank you for all the work you're putting into getting okay very nice stuff thank you jay and i thought since halloween is one of our favorite holidays that we'd share a bit of it with you you'll need to open the cases in order or it really won't make sense we hope you enjoy the goodies even the ice is reusable eric and jay from bakersfield so in in in freezer bag number one first you rip it open okay hot dog buns all right all right they want to see you happy halloween happy halloween happy halloween happy halloween happy halloween yeah okay freezer bag number two so we got hot dog buns so far from jay and eric organic ketchup and beef hot dogs on ice and this says what does this say then you pour the ketchup blood red and what do we got hot dog buns hot dogs and ketchup blood red well there's a third freezer bag and then you pour a nice cold drink with the hot dog in the hot dog bun and the blood red ketchup and some spiced cider happy halloween thank you fellas and then an hour ago the doorbell rang again or the door knock on the door again fedex guy uh curtis from yakima he's like hey nick on the rocks how's my hair he's like i got a box for you this box is from scotty that's the state of wisconsin from o.h bakery this episode of nick from home brought to you by oh h bakery danish bakery in which racine wisconsin you've got to love it and there's only one little card it says a gift for you happy halloween from dick dick are you in racine wherever you are dick thank you so shall we look at what was delivered it's a day of the dead layer cake very kind of you dick might have to freeze this one too otherwise i'm going to eat the whole thing tonight we don't we don't need that i'll have a slice maybe with everybody at the end of this show how about that i got one more i'm sorry but i i so thank you to everybody i got one more i've had this one a while this is from this is for a box the box is from mark in tucson arizona hi nick thanks for your current exotic terrain seminar and also your past lectures i'm a retar uh retired oil and gas geologist and your video scratched an itch for a bustman's holiday without leaving my chair enclosed is a hand sample of one of arizona's exotic terrains 1.75 billion-year-old hematitic jasperoid banded iron formation collected on mingus mountain a few miles southwest of the town of jerome arizona this terrain called the yavapai is a northeast trending series of island arcs accreted onto the core of larasia old north america at about 1.7 billion years that's amazing you want to see it they flip you around ah sun's probably wrong for you huh yeah sun's wrong for you this thing's heavy so this is 1.7 billion year old exotic terrain material from arizona and there's one more thing mark i really appreciate this mark goes on to say and yes a bit outside your current neighborhood but i've never known a geologist that didn't like a pretty rock with a good story finally i found this photo on the internet and my understanding is that this was taken in the last few seconds of the game and john stockton had already geared up to make a dash out the back door to slam down some strike and dip measurements on possible quant quenellian thrust faults so mark i don't know how you found this john stockton watches this show on occasion but uh great find it's a button compass that a geologist uses that's a hand lens that's a rock hammer thank you mark all right okay well bijou is sitting on the books right now uh so i'm gonna kick him out of there yeah you're done you're gonna it it's already two minutes after i'm sorry to be late um uh can i check one more time are we are we doing okay and then i'm gonna need another couple minutes to collect my thoughts here i'm a little bit late to be totally honest i had trouble with the phone i couldn't connect i had to totally shut down the phone and restart it we're good okay great thank you we'll start in one minute are you going to stay out here with us mister that sun feels pretty good huh hot mike all right hello and welcome it's a beautiful friday afternoon here the wind has temporarily calmed down and maybe it'll kick back up again but we're we're sheltered here and we've got nice strong late afternoon sun in fact hang on i should protect this phone so it doesn't melt again if you're with us a couple weeks ago the phone literally shut down because it was too hot and uh that that uh that sun is strong right now cozy fort by steve a little early oh i need an anchor for this blanket i know i'll use a banded iron formation where to go all right thank you for your patience okay today we're talking about the san juan islands here in the state of washington can you believe it we're finally here so it's essentially november you know a couple days from now and i promised that by the time we get to november we would be in the north cascades and we would be in northern washington learning and applying what we had learned earlier so most of september in this series when we started we were setting the table with a bunch of concepts and then for most of october we were up in british columbia i'm reminding you what we did and we built five huge exotic terrains one at a time essentially we had a show for each cornelia cash creek stekenia alexander and rangalia remember actually let me so i did this in the last show i'll show it to you again with some beautiful new clipboards that i have thank you dave so quinellia cash creek and stekenia came in together as the intermontane super terrain 170 million years ago that doesn't say that the rocks are 170 it means that they accreted or added to the edge of north america roughly 170 million years ago and then the insular super terrain the topic the last couple of sessions is rengelia and alexander terrain uh joining up offshore and then being added roughly 100 million years ago now i've learned a lot for today's session in the last 48 hours essentially and i'll say read up front i've been surprised at the timing of today's topic for some reason and maybe i read it and saw a diagram and just had stuck in my head but for some reason i thought the timing was such that the san juan island exotic terrains the topic today were caught in between these two super terrains when they finally collided together and we are talking about thrust faults which mean that the crust was compressed and we are going to be looking at the the exotic terrain rocks that are here in the in san juan islands and then we've got a couple of special viewers who have some memories for us of the geology of that area and the geology workers of that area but i gotta say uh i'm still trying to process what i think i understand now as far as the timing of this bijou has climbed up in larry the ladder and is now poking his head out through the quilt underneath the phone adorable a touch more review and then we're ready to go so we had this format do you recall we had this format for learning the rocks of these exotic terrains and this is the format we will use again today i don't know maybe it's the format we'll use for all the rest of the exotic terrains that we study in the north cascades etc but i'm reminding you that quinnelia had a variety of rocks in this age span and we have plenty of arc volcanic material on top of older basement same for stukenya arc volcanic sitting on top of older basement all in the neighborhood i hope you can read these numbers here as far as millions of years ago this is not age of accretion this is the age of the actual bedrock in those two exotic terrains and then we stress the point very very carefully and there's a reason i'm going through this again with you right now we stressed the point pretty carefully that the cash creek terrain which is sandwiched between the twins has tethian fossils within it indicating a very long journey from across the pacific so it's basically asian material in the limestones and the oceanic plateau material that was probably originally off the coast of asia in the southwest pacific and here it is making up a large portion of british columbia last review piece of paper more recently we talked about the insular super terrain both alexander terrain and rengelia now these are not the twins these have a totally separate story from each other and if you recall the alexander terrain the oldest rock of the alexander goes back into the late pre-cambrian and stretches all the way up to almost 260 million years ago what was our conclusion from this alexander terrain story it's the leading idea i don't know if it's a done deal but the leading idea for the source of the alexander terrain was northern europe was northern eurasia and bringing the alexander terrain you recall through the arctic when the arctic was at a lower latitude but through the arctic and then getting offshore of western north america this is the most recent exotic terrain we discussed jerome lessman vancouver island university gave us a field report we're holding on to his other field report for a while but we the main message from rangeli was talking of a large igneous province a huge oceanic plateau that was almost completely underwater a little bit sub-aerial but for the most part bunch of pillow basalts of rengelia and these two guys got hooked up we think older than 309 million years ago but i'm starting to wonder about that based on some of your excellent questions but our last point is that this super terrain the insular super terrain was added roughly 100 million years ago is that the last show we did no the most recent show was last sunday and we took a break from going uh terrain by terrain and we talked about exciting new work by karen akarim sigloch and mitch mahalanik who discovered how to take ocean slabs in the deep parts of the mantle and realize that those ocean slabs used to be offshore of north america and by working out some timing and some geometry and some math and some sinking rates and everything else it was concluded by karin and mitch that the insular super terrain was a volcanic ark that was stationary it was fixed in place out in the pacific and north america moved westward and there was westward subduction of ocean floor connected to north america and i noticed that some of you were saying what does it matter like the thing is added on like who cares who was moving or what direction the subduction was well i ask you to keep score in the next few shows why that's important why that is important to reconstruct whether it was westward or eastward subduction and whether the insular super terrain was moving or not i think you'll see why that's a crucial question and a quick crucial answer in the coming shows but we're finally to talking about the san juan islands themselves and your friend biju is still hanging out in his new home and i'm half distracted by that but i'll try my best to focus on you san juan islands so for those that are watching from distant lands we're in washington and we're probably in washington to state to be honest we're in washington to stay and to get to the san juan islands which is truly a beautiful collection of islands out here in the water this is northern puget sound this is the salish sea i'll just slow down and give you a chance to look at this now the colors are wrong for us but this is the olympic peninsula this is seattle washington here at the north cascades where we are heading in the next few sessions my backyard is here in ellensburg washington but it's going north on a freeway called interstate 90 about an hour and a half you get to a ferry dock near anacortes washington that's a town we're going to do a little geography here just to get ourselves state kind of situated and then we're going to cruise around on these islands out here in puget sound and maybe you're from washington you go well wait a minute seriously i i thought it was nothing but glacial deposits all through puget lowland and you're right that puget lowland deposits are almost all glacial whidbey island uh all those islands south what i can't think of another one right off the vashon island etc those are all glacial islands glacial deposits glacial till glacial outwash et cetera and you'll see and just well let's do it now there's a lot to take in here and i've been busy with my colored pencils and a part of the box that the guys from bakersfield sent but the first thing i want to point out is there's a bunch of gray here and the gray is glacial cover glacial deposits so even on the san juan islands themselves there's a lot of glacial deposits from the puget ice sheet uh most recently just uh less than 20 000 years ago so the glacial story is in the area but the luxury is if we look at the bedrock which is a rarity in puget lowland but if we do get a chance to see bedrock and that's what all these colors are you can have a heyday you can have an absolute party breaking open exotic looking rocks and they are truly exotic and realizing that much of the bedrock of the san juan islands do have an exotic terrain history and one of our goals is to try to tap in to what we've done already in british columbia and see if there's any connection to some of that stuff in the san juan islands have we done anything yet yeah we kind of have but we're still just kind of setting the stage so you're like can i take a look at mapping the map and and see what we're doing well sure but these terrains making up the san juan islands are tiny they're itty-bitty little baby little cute little baby exotic terrains and as daryl cowan has found her saying and daryl is with us today i think what daryl what what can you can you identify yourself here daryl he goes by a handle of like uh aponino or something some a something so if the drinking word today is daryl you're going to get drunk because daryl is featured in video daryl's is part of the roadside geology authorship team there he is aponino thank you daryl so daryl was fond of saying that that these uh exotic terrains in the san juan islands are just little slivers they're slivers of something that used to be larger in fact i'll give you the concept right now these exotic terrains in the san juan islands are so thin and small in comparison with this show that he said uh he's fond of saying um the san juan island terrains are like hats without their heads we've just got the hats to look at the exotic terrain hats but they almost certainly were connected to heads and the heads are maybe the major story of the history of those san juan island exotic terrains so yes i'm still setting the table with you but here we go i mean how can i get in here can i get over the banded iron formation can i fight bijou for some real estate there we go there's some colors but look at how adorable look at how cute those teeny tiny little exotic terrains are potentially very important by the way but the scale is so different from what we had up here okay that was our first main message that there are exotic terrains to look at but they're the scale is totally different okay i think you got it well i want to show you some of the resources i've been using to put this together and then we'll go ahead and look at the actual rocks so there's really two guys currently who are authorities on san juan island exotic terrain material daryl drank cowan who's watching live today from the mojave desert by the way he just flew down yesterday and ned brown who had a long storied career as a geology professor at western washington university in bellingham washington so these two papers were particularly helpful to me so ned if you eventually watch this i've never met you ned but thank you for this paper that you put together with george girls and also this paper as well also from 2007 the book that consuelo from seattle sent to me because she was done using it is by ned and so if you can get your hands on this this is beautifully done we'll refer to it a number of times the photos in here the diagrams etc but right up front i'll tell you that ned has some tectonic models that are different than daryl's and that's this is not one of those shows where everything's been figured out in fact are any of these shows totally figured out probably not but in this case there are significant questions that remain about the history of the exotic terrains in the san juan islands not necessarily the creation of the terrains but the major mystery is act two here how are we bringing these terrains in so i'm a little ahead of myself so ned brown will refer to this book a fair amount in the case of daryl drink daryl drink wrote this with former student mark brandon and joe vance i think preceded daryl at the university of washington so this is a professional paper put out by the geological society of america this is my copy that i bought when i first moved to washington in 1992. megan miller was my boss at the time and i said can i do we have enough money for me to buy this of course and it's collected dust since then so i've i've used it really for the first time so i'm going to say daryl a lot because daryl has a lot of work in here that we're going to use with his former students and his colleagues and of course many of you have this book and it's co-written mostly written by marley miller a former student of daryl at the university of washington but i'm just going to say daryl for simplicity first because i want to get you absolutely blind drunk today but also because daryl is contributing mostly to this uh book and i'll i'll i'll show you my favorite section here maybe you found it i mean this is a roadside geology book but does that work with the san juan islands can you just hop in a car and start driving around and easily visit all these islands of course not you need a ferry so starting on page actually did we discover this before are the pages off are my pages not the same as your page so this is what my 98 to 99 look like those that have their book right with them daryl and marley's book is this your 98-99 if not daryl what kind of what kind of operation are you running there how come we have different page numbers but my point is daryl takes us on a roadside guide on the ferry on the ferry going from onyx anacortes out to friday harbor so let's slow down and start looking carefully at the geography as well as the exotic terrain bedrock geology of the san juan islands let's get that thing's met so i'm just going to hold this for a second i i'm kind of blinded by the sunlight anyway but i like good strong sun and to me that i think i've said this before stuff only really makes sense to me if i draw it out for myself or if i color things the way that i want to color them so this is the geologic map from the back pocket are you familiar with these geologic publications oftentimes there's a cute little sleeve in the back and you and you have a little gift waiting for you speaking of gifts a little gift in the back cover and in this publication from 1988 here's the the old school map well i've never used it i've never really looked carefully at it so i broke out the colored pencils and came up with the coloring scheme and i added other things as well so many of our viewers are from the pacific northwest and i'm sure you have personal history here whether it was a vacation or a second home or a first home or whatever in our case my wife liz 20 years ago taught at the middle school here in town sixth grade science when our kids were going through the middle school and they had a big sixth grade science class so they'd leave on a thursday morning at 3 30 in the morning here they'd load up three school buses worth of sixth graders the entire sixth grade student body all the parent chaperones and my wife was one of the teachers and they would drive the three hours or whatever to anacortes and get over to the ferry at anacortes and then they'd load the school buses with all the sixth graders what a wild scene onto the ferry and the ferry would go past decatur blakely islands around the north tip of lopez and then arriving at friday harbor a little town there and those sixth grade science classes you know my wife was always as a total basket case after that annual trip for good reason she spent you know 48 intense hours or maybe more with those sixth graders but they would sleep on the gym floor at friday harbor high school and and get a little experience on the san juan islands so i'm sure you have personal memories as well from the san juan islands but that's our story so we'll keep coming back to this but i think it's time to go to our stratigraphic columns to give you some main messages about the rocks on the san juan islands bedrock how many clipboards does this guy have 11. thanks dave all right so this is your trusty correspondent using our familiar format and summarizing you know what i like to do i don't like to tackle every last little morsel so these are the in this is my decision to break the san juan island bedrock into four major exotic terrain chunks each of these in exotic terrain can you read the names the turtleback terrain the dead man bay terrain the constitution slash lopez complex terrain and the decatur terrain okay now let's scan some of these rocks in turtleback again i'm looking backwards but i think i can read this stuff mark volcanics limestone uh-huh shirts and some plutonic rock down low some more arc volcanics that's kind of familiar the age is here okay we go early paleozoic okay all right let's just leave that alone for a little while i don't know if i'm super excited you say by this except we have a new name for some reason dead some of you are ahead of me i hope dead man bay terrain okay pillow basalt some deep water shirt layers ribbon shirt in other words teeny tiny silica bodies that are falling to the bottom like a huge snow storm a constant silica snow storm on the bottom of the deep oceans and some limestone with some tethian fossils and we will briefly visit lime kiln point i can't remember which island that's on but we'll look on the map i'm sure you've got it let's continue well these two guys are co-evil they're about the same age that's kind of interesting constitution slash lopez may melange now if you remember the word melange that's a kind of a jumbled mix of different kinds of ocean rocks and some more this shirt this ribbon shirt this beautiful kind of attractive looking layers of hard shirt with some softer stuff in between and we'll go to rosario head a favorite place of mine that i learned about by using daryl's book and then the decatur terrain oh feel like now that's the first time we've really seen that word and a week from today a week from today we're going to have a guest in the backyard he's a neighbor he'll come over for a cup of sugar and also tell us about ophiolites and other strange rocks that are found in northern washington so let's save our detailed discussion of ophiolites until next friday if you don't mind but there's more church and there's some sandstone and fadalgo island and a high point on fidalgo island called mount erie part of the decatur terrain okay are you ahead of me you're like what what am i just you're moving kind of slow today by the way why don't you pick up the pace well no i'm i'm not going to you know i work kind of at one pace but i'm hoping that you see some familiar scenes in fact aren't these familiar colors isn't this yellow and isn't this grello gray combined with yellow the answer is yes it is so what's the reveal i can't read your comments too much sun what's the reveal these rocks being so old and having a few distinctive marker beds within them what does the turtleback terrain sound like hang on patrick it's a conventional message in the literature it's not me grasping at straws it's pretty conventional that the turtleback terrain of the san juan islands is awfully familiar not identical but awfully familiar to the alexander terrain which you recall is exposed much farther north north of vancouver island let me remind you where the alexander terrain yellow is located alexander terrain prince of wales island north uh the coast of bc up to the walls of glacier bay i'm saying that there's a little bit of yellow in the san juan islands and i chose yellow because there's enough convincing data to say that the turtleback terrain is the same stuff and therefore has the same source the same general source which is the northern eurasia source hold on what am i saying where's the turtleback terrain on this map it's here the northern half of orca's island is made out of the turtleback terrain which is probably alexander terrain material pause for dramatic effect this is an immigrant that came through the arctic and is now making up the northern half of orcas island and you're like oh that so everything here then is from europe nope just the yellow just the turtleback terrain which is uh not only the turtleback creek but the what's called east sound group that's ned's terminology these two guys together alexander oh crap i already so much for the reveal you can read right so if i mention that that next group i'm reminding you now what grello what grello was before with tethy and fossils grello that has a long story a long travel story a trans-pacific story yes also not controversial most workers now see that because there are tethian fossils in the dead man bay terrain of the san juan islands the dead man banter the dead man bay terrain came from across the pacific not through the arctic but today they're sitting side by side how's the how's the viewing here my goodness i'm totally blind but i'm assuming you can see this so here's the gray the gray mixed with yellow coming through this little sliver here we'll talk about the orange in just a second we're just looking at the bedrock and how we have dead man bay which is the orcas chert combined with some volcanics of the dead men bay volcanics it's really those tethian fossils that tell us we can correlate pretty safely this dead man bay terrain making up the central part of orcas island making up the northern part of the big island of san juan san juan island trans-pacific so that's why i chose yellow and grello same colors we had before now i had hopes of taking the other two guys and doing the same kind of correlation bijou backs on top of all the maps if he wasn't so darn cute i'd shoot him away with a bb gun whoop sorry i have just kind of a philosophical question for us and i don't have an answer my philosophical question is i don't know if it's philosophical but my big question is that's kind of a work in progress is are things as obvious as they appear to be like i haven't been up in bc hardly at all you know that so i don't have personal stories of going here and here and here and seeing all this stuff is it as simple and as big and as massive and as kind of clearly laid out as it appears in all these reports in british columbia and play along with me are many workers pretty confident that we have cash creek and quinnelia in the blues in cash creek in cornelia in northern california in cash creek in the uh quinnellia in the sierra foothills are we are we confident of that too if yes then why aren't we finding a whole bunch of stukenia cache creek and cornelia like obviously where we are now in northern washington and you're like well i think you just did it didn't you well yeah in the case of the dead man bay terrain apparently pretty sure it's it's cache creek but as we'll see once we get into north cascades and maybe i'll make some connections and connect some dots that don't seem to be obvious to people but daryl in particular drake who's been emailing me very very helpful he says that once you get into north cascades i don't think you can do it i don't think you can you can find a bunch of quinnellia and stikenia necessarily and a bunch of people have tried a bunch of field geologists have tried nobody can agree so i thought possibly that was a doable thing for us i don't think it is based on what daryl has to say and so i went into that little it wasn't durant but that little improv because what do we do with the green and the purple these are new colors for us i hereby declare i hereby declare get off the clipboards bro i hereby declare that the constitution slash lopez terrain is green and i hereby declare that the decatur terrain is purple now we're going to do more green and purple on sunday maybe there to be a ton more green and purple in other words matches or extensions of these two guys which are only in the san juan islands for us today but are we going to find more of them i don't know hell all up and down the west coast of north america maybe i'm not being coy i don't know but my from a teaching point of view i want to go there of course i want to tell a bigger story and andy miner and cleolum who's uh my biggest longest pen pal on this stuff is constantly saying don't do it don't you can't do it don't don't dumb it down don't make connections that aren't there i know you want to don't do it so i'm listening to my advisors so let me show you a couple of these picture books and i'll show you a little bit of the tethian fossil limestone which has been converted to marble in some places the rosario head on fidalgo island mount erie and other places on this actually before i show you those pictures let me finish the work on the map then hope we're doing okay again we're ignoring the orange those are thrust faults let's ignore them right now so all this green there's kind of two shades of green there's kind of the constitution formation and the lopez structural creek complex daryl lumped those together in his book so we'll do that here too and again i don't have a correlation we might eventually but i don't have a correlation for you now but you can see that a substantial part of san juan island itself including friday harbor is our constitution slash lopez we come through orcas and we even swing down here this little sliver of lopez island and this little sliver oh still on lopez and even a little bit down here at rosario head is our constitution slash lopez now remember these guys are pretty much the same age i forget like 160 to 100 i don't have the numbers i should have wrote them down and just to finish our purple hope you can read this is the decatur terrain which is a combination of the lumi formation and the fidalgo complex so that's where we have our ophelite and our diorite our big plutonic rock and some other complicated rocks that are part of a story there i can't hold it you're going to have to wait i got to find this again i'm trying to give you conventional interpretations i'm going to show you a pbs episode that features daryl and the topic is wrong actually for the topic is baja bc and we're we're not going to deal with baja bc until a month from now but i want to show it to you today anyway because we filmed it at san juan islands we got daryl up on this beautiful mount eerie location it almost looks like a green screen it looks too perfect to be real but i assure you it was real and daryl was so good on camera that we used way more of him than we normally do in those little short episodes but this is from when i was putting that kind of show together and i was trying to visualize what the decatur terrain was really trying to represent and this isn't colored and everything but we have our ophiolite sequence that comes next friday our diorite of mount erie our limestone coral reefs our sandstones our volcanic material all of these rocks are found in the purple and for my purposes where i'm trying to communicate with the general audience the main message is this decatur terrain is representing some kind of volcanic ark some sort of oceanic whoa whoa whoa oceanic volcanic ark that looks like this with a subduction zone nearby maybe westward subducted maybe eastward subducted maybe northward subducted i don't know you know what my gut says is the decatur terrain stekenia is it cornelli is it one of the twins if it is how would we how would we decide what kind of clues would we have in all this purple of fidalgo island decatur lopez blakely cyprus guemes if that's how you say it lemmy is there a way to correlate and is it important to correlate at this point as we'll see with these thrust faults it's a hot mess and it's difficult to visualize the sequence of bringing things in we haven't accreted anything yet i'm just talking about the geologic history of building each of these exotic terrains okay give me a second let me see if i if i'm done with act one that was a long act the other acts are short yep yep yep right i'm not even going to show that to you all right hop mike oh yeah i wanted to show you a couple of books oh there's even another book i forgot i had that i want to show you so some of you may know gene keever k-i-v-e-r he's a long he was a long-time uh geology professor at eastern washington university in cheney over by spokane and i know gene a fair amount and i know that he splits time between anacortes half the year and cheney over by spokane the other half it seems like a great setup and gene has put out a lot of uh publications uh not only in the scientific literature he's all over ice age flood stuff for instance he's the co-author with bruce bjornstad on on the trail of the ice age floods book two but gene also has done i don't know if he's done more than one of these but this is him and chad pritchard at eastern washington and i don't know richard but here's another book for your library if you're interested and gene and chad are going all across the state and just kind of it's almost like a coffee table type book there's some beautiful photos but he picks gene does because he lives so close little little places to visit in the book lime kill point iceberg point washington park that's on fidalgo island really wonderful place and deception pass if you're waiting for it deception pass is part of this story so uh let me do this quickly let me do this quickly the hell is it sorry patrick all right so lime kiln point it's a bunch of limestones with tethy's fossils in it so that must be dead dead man bay terrain right that must be cash creek that crossed the ocean why is washington's park so cool well i'll just give you a little bit about an ophea light and ophiolite is looking at the subflooring of an ocean floor like it's it's mantle material it's a rare chance to look at mantle rocks that somehow are out of an ocean setting and crammed onto a continent and washington park is unique for a number of reasons it's very close to the ferry terminal at anacortes there's this cool little drive this kind of slow little road going through this area and you're going through all this very crazy looking mantle rock and sir pentanite and other things we'll learn more about next friday but washington park uh a special place on fidalgo island and then yes some of you know about deception pass which is a beautiful area very very popular washington state park at deception pass the actual body of water deception pass has this majestic bridge but the bridge is anchored on both sides with exotic terrain material i guess it's decatur terrain although there might be a little bit of lopez there okay so washington rocks by gene keever do more of this little photo trip with ned brown's book wind isn't too bad i'm happy with the protection here so the alexander terrain aka the turtle back in the san juans ned brown from all of his multi multiple decades of work uh gives us some looks at these rocks that used to be part of europe according to the leading idea the turtleback terrain just giving a little sampler for what it's like to be looking at rocks i mean you're not by the side of the road here you're not by some off ramp you know and tuck willa i mean you're you're in beautiful terrain and i mean a.i.n beautiful terrain that exposes terrains a e look at this ribbon shirt ocean most of this has an ocean story of course all right pick up the pace pick up the pace i want to find a cartoon that i like there's a couple that i like while i'm in ned's book wrong colors for us but another another shot at the main story i promise i'm getting to the thrust faults but i'm i'm having a good time here give me 10 more seconds if i don't find it i'm quitting here we tried to do this in the cash creek show do you remember we had a picture looked exactly like this and i said if you can imagine this uh cass creek material with the tethian fossils are depositing in an ocean basin offshore of asia and then obviously there's a different global geography during this time and then this material this is today's dead man bay terrain right is arriving on the other side of the world god that's amazing that really is amazing and now that i'm giving all these other books a shine and since daryl is watching of course we have to work with these pages and just do a little bit more although i'm assuming many of you have this so here's just fidalgo so i copied daryl and marley with their purple for decatur and their green for lopez constitution and i love rosario ahead if you only have one place to go that you can just drive to you don't have to get on the ferry for this i mean washington park is pretty sweet but i love rosario ahead and there's actually two terrains there there's the lopez with the stunning ribbon shirt there's a little bit in the video i'm going to show you and then the decatur as well which terrains are those connected to slide mountain ocean franciscan in california quinnelius the kenya i'll stop and just to be complete wrong colors for us there's daryl and marley giving us our ferry ride and the same general story okay i think by now you have different sources different ways to present the terrains a e of the san juans and the main message is we have four exotic terrains in the san juan islands with four completely different stories in the case of two of them from different sides of the world or they're coming through the arctic and across the pacific and here they are in the san juan islands we're transitioning now and this will be quick to the thrust faults and it'll be quick because there's major questions but we do know a couple of things so i'm going to use a combination of daryl's map and ned's cross-section so let's go to this map i hope this is helpful to you it was helpful to me again just to get this stuff down in one place so now that we're comfortable with places and island names and yes there's something called the nanaimo group that's up here that i'm not focusing on today but this will come up just a little bit today but now i would like to look at the boundary between these exotic terrains so we have four terrains and we have three orange faults so of course if these are completely different stories coming from different parts of the world there has to be a very abrupt fault boundary between those exotic terrains and that's definitely the case and by detailed work on these three orange faults we know that they are thrust faults thrust faults you're like i don't think i know what that is well first message different kinds of faults tell us about different actions with the crust if you are a normal fault that's a fault that's making earthquakes and a normal fault is the result of pulling the crust apart crustal extension you make a normal fall is it a strike slip fault and we'll be getting back into strike slip faults in the next couple episodes strike slip fault okay that's a different kind of fault we're making earthquakes on a strike slip fault that means the crust is being wrenched laterally reverse fault that's something different a reverse fault is a crack making earthquakes but a reverse fault is from squeezing the crust together i'm going to draw this now so those are three words that i think you know thrust reverse no three words i think you know reverse normal and strike slip you know three words normal reverse and strike slip but today we're talking about thrust faults so what is the difference between a reverse fault and a thrust fault and is it important to recognize that there's a difference between a reverse and a thrust fault this goes back to the spring when we had different live streams and i did one on faults i think i can't remember so we have a hanging wall and a foot wall we have an angled fault this is a cross section and we have a fault going into the earth at an angle in this case it's a pretty high angle it's not a vertical it's not a 90 degree angle but it's not a very low angle almost flat fault either it's got an angle that's let's say it's got a this fault has a an angle away from horizontal that's steeper than 45 degrees okay a high angle fault a steep fault and if we have an earthquake and the hanging wall abruptly lifts compared to the foot wall we call that a reverse fault and a reverse fault is the result of crustal squeezing you squeeze the crust if you make a high angle fault and the hanging wall goes up you're going to make earthquakes the seattle fault for instance totally top different from our today's topic but the seattle fault is a high angle reverse fall okay well we have thrust faults today those three orange lines on that map are thrust faults how is that different it's very similar but a thrust fault is a low angle fault not a high angle fault so this was a fault that was steeper than 45 degrees here's our 45 degrees away from horizontal again but now what if our fault is in this sector what if our fault is lower than 45 degrees i'm not talking about temperature right this is a little bit of geometry so let's say this is a 25 degree fault it's not zero zero is flat but it's 25 degrees a crack going into the earth but we still have a hanging wall we still have a foot wall we still have crustal compression and when we have an earthquake on a thrust fault we still have the hanging wall going up to review both reverse and thrust faults oh gosh oh that's right reverse and thrust faults are both the result of crustal squeezing crustal compression shortening the crust causing uplift by the way we have these hanging walls go up we're going to have some uplift we're going to build the crust up we're going to intensify the erosion on that uplifted block on that hanging wall block this is what we want to visualize for the san juan islands now that we know we have thrust faults with a low angle versus reverse faults with a steep angle anybody still with me i have a prop what props could i use from the kitchen to show that these are thrust faults and that these pretty thin teeny weeny baby little exotic terrains are thrust sheets also called naps n-a-p-p-e if you want to really impress your friends tomorrow morning at coffee with your masks on you guys know what a nap is n-a-p-p-e i do it's a thin sheet of bedrock that gets shoved up a thrust vault so anyway what were you talking about so each of these is a thrust fault and the black teeth if you can see the black teeth show us that the hanging wall is on this southeast side of each thrust fault so i want to generalize before i show you my prop i want to generalize i know these are curvy but i want to generalize generalize that these three thrust vaults have a trend north east southwest are you willing to do that with me i just erased it but i want to do it again top of the hour top of the hour i was almost sure this was going to be a shorter show what a laugh as merle says what a joke on a map of the san juan islands our three thrust vaults north south east west that's the thrust fault this is the thrust fault we got three of them separating our four terrains i'm hitting hard what we know because we don't know much more than this about the thrust i'm talking about daryl and ned and all their students and anybody else who's worked in this area as far as i can tell okay northeast southwest trending thrust vaults and i'm saying what the thrust vaults mean we have compression so from which two map directions are we going to be squeezing if we have north east southwest thrust faults on a map i'll wait from which two map directions i don't know if they're cardinal directions from which two directions are we going to have squeezing pat miller northwest southeast northwest southeast southeast northwest yeah way to razzle dazzle there scott correct now it's tempting to hit that pretty hard and go hey man you know when these terrains came in we had a northwest southeast collision but you know how crazy the paleogeography is and we're back a long time ago so who knows what the orientation of these things were when they were active but that brings up a question when were these thrust faults active and what is the freaking prop i'm tired of waiting let's do the prop first this episode of nick from home brought to you by california pizza kitchen you gotta love it we like the crust and when we're particularly burnt out and don't feel like cooking we pop in a california pizza kitchen so check it out it's a frozen pizza check it out it's pretty thin this is a nap n-a-p-p-e it's only a nap if it's a thrust sheet that has been thrust over another thrust sheet so what you want to do is you want to take a four cheese california pizza that's one exotic terrain you got another totally different kind of flavor a white ready compress oh compressed oh compress oh that's nap action baby that's two exotic terrains totally different pizza different flavor came from another part of the world like italy i don't know stupid thrush sheet nap it up uh uh uh uh earthquake each time we're going up we got another one oh yeah margarita okay four exotic terrains make four exotic terrains making up the bedrock of the san juan islands four very clear naps in a thrust stack i can't hold it i'm going to give it to you verbally i'm not going to write it down you ready remember at the beginning of the show i was surprised at the age of action on the thrust faults i thought everything was getting caught between rangelia and the insular with intermontane not so here it is verbally the stacking the thrusting the uplift happened between 184 million years ago what am i talking about i'm not talking about the age of the rock now right i'm talking about when were these sheets active they came from four corners of the world let's say but here they are together and they're being thrust one on top of another and they were doing their thrusting they were doing their earthquake activity up those fault planes in a very specific time window between 184 and you're like 100 that sounds familiar 100 what is what's one what was 100 again that's when insular super terrain came in that's when rengelia came into this area so this thrusting happened in the san juan islands after the insular super terrain arrived i don't get it dress sheets now i did a quick email last night because i was confused and daryl replied i said daryl do we know the relative age of these blocks i mean we like the emplacement age of this like i'm showing you oh just lost the terrain i'm showing you that the bottom guy was here first this is easiest for me to visualize the turtle back was here first here comes the dead man getting shoved up the ramp then the lopez constitution then the fidelgo daryl says we don't know that we're not we don't we don't know that to me this is like a four car pileup you know each pi each car is coming in and being shoved up the back of the next one like a game a leap frog sorry patrick but there's no evidence to prove that timing but i don't know if it matters we have compression we have thrusting and we have uplift and i can't hold it god it's almost done after it's fun i can't i'm sorry i can't keep these under an hour there's no way this will be quick famous last words but the idea is that when we do our thrust activity our hanging wall gets shoved up i've already mentioned that there's some uplift then we're actually creating some ridges or maybe even some mountains in the sand what is now the san juan islands and there's a general law in geology that uplift intensifies the erosion just generally cartoonishly if you do a lot of uplift of an area you're going to energize the rivers and the glaciers and other things to kind of chew away the topmost part it's almost like um a circular fan like a ceiling fan but let's pretend that ceiling fan is a circular saw okay and let's have our pizza boxes our thrust sheets our naps let's keep sending those pizza boxes up their thrust vaults until they intersect with the ceiling fan what's the ceiling fan the circular fan it's rivers it's it's erosive agents on the surface so we're sending our pizza boxes up into the ceiling fan and we're gonna chew off we're gonna keep chewing off the leading edge of the pizza box we're going to erode and crumble we're going to make sawdust out of these sheets of plywood that we're sending up in the circular fin can you keep track of all these analogies and this sawdust that's coming off of this erupted sorry patrick the sawdust that's going to come up away from this uplifted hanging wall is a pile of sedimentary rock nearby it's called the nanaimo group we're not going to talk about the nanaimo group today it's got a whole separate story but most of the work that i've been able to read and maybe i'll get some help from some of you but the sediments called the nanaimo group are a direct result of eroding the uplifted naps in places like the san juans and if you're waiting for details on where these four terrains are coming in when they're coming in how they're getting parked we don't have it so we are embracing together major stories of exotic origin of these four terrains and now that we understand that these orange things are the thrust vaults that separate the pizza boxes that's going to have to be good enough for us today act three are a couple of quick memories not from merle merle beck has been writing up some wonderful little personal memories for us about the early days of exotic terrain research uh i have one memory from pat miller who i just saw was with us does that name sound familiar to you pat miller pat miller pat miller created this out of wood and there's a personal story that i shared last spring about rock columns that i was walking around on and then i dropped one of my rock hammers down a crack between two of the columns and so pat took that and as an artist created this out of wood including the rock hammer i shared this last spring but i don't want to say it's a favorite gift because i love all the gifts but pretty good gift pat so pat miller so pat emailed me this week and said you can share some of this if you like maybe just for laughs pat was a geology major at washington state university in pullman and they did their summer field class seven weeks of it in the san juan islands in the summer of 1971. nick i did my washington state bs in geology field camp requirement spending seven weeks in the san juan islands in the summer of 1971 with seven other guys under the direction of dr frank scott my 50 year old report is attached here uh i thought you might enjoy a bit of very old and bush league reporting he was like a senior and as an undergraduate maybe just share it for uh comedic relief so i scanned or i printed out one of his pages i won't embarrass you too much pat it was kind of fun to read this is chapter five historical geology from patch report in 1971 the geologic history of the project area is best explained on the regional scale with particular attention paid to those events pertinent to the area huh these three general statements can be made about the history of the region you're stalling pat these are that the area has always been in close contact with the sea subject to much volcanism and in a highly active area of the crust and he goes on from there to be fair barely knew about plate tectonics in 1971 so i think you're off the hook the other memory is from daryl daryl wrote this up it's online called the geology of the san juan islands by daryl cowan i'll just read you a portion of it because we're running late um daryl cowan from the university of washington he wrote this recently i'd like to describe a role that roy mcclellan and other faculty members and students at the geology university of washington have played in investigating the very challenging but intriguing bedrock that lies beneath the extensive veneer of softer more easily erodible glacial deposits mcclellan made his map as part of a phd thesis which was the first in geology at the uw published in 1927. mcclellan defined several new formation rock units that consist of distinctive rock types someone told me that he studied the extensive coastlines by rowboat i think his work in the field and in his thesis deserves to be called monumental decades later ted danner in the 1950s made an exhaustive study of rock units in northwestern washington and that was his phd thesis completed in 1957 ted danner he probably visited even the most remote outcrops and quarries in the san juans limestone was economically important and perhaps danner's most important discovery was the remarkable similarity of fossil fusilinids marine foraminifera that lived in the permian to the same protozoans found in rocks of the same age in japan those are the tethian fossils we're talking about so that was discovered in the 1950s by ted danner at the university of washington danner later became a professor of ubc british columbia in the 1960s uw professor joes vance began geology mapping and studies of the bedrock on orcas and san juan islands and then daryl writes i arrived in 1974 and i visited uw professor john witten's field class for majors and non-majors at camp norwester and then on sperry peninsula on lopez island and and daryl reports that the 1927 to 1975 maps held up pretty well wetton kindly showed me other outcrops on the island and in 1976 i began a multi-year study of the bedrock of the archipelago we stayed in dorms at the labs friday harbor labs which i must say were pretty rustic compared to the relative luxury of the accommodations today what had changed from the pioneering work of mcclellan and danner plate tectonics we are now comfortable with the idea of mobility of the earth's crust rocks can move the complex rock units of the san juan islands were assembled into a collage about 100 million years ago a key debate still remains centering where this collage originated okay thank you daryl thank you pat we're going in the cozy fort i don't know if bijou is still with us or not no he took off almost 800 good i've got some video clips to share with you cozy fort by steve trademark some of you are we're not with us in spring and you're like what's up why do you call it the cozy fort it's a long story and i shared with everybody in the spring but my dad was a good dad and when we were kids my sisters and i whoop i'm gonna need that bandanna iron formation again there mark uh my sisters and i would make forts out of cardboard boxes in the basement we called it cozy fort maybe you did too my dad was a an old football player big guy but he would crawl in there with us and we would have little parties so cozy fort no crying in the cozy fort now too late all right so i'm muting the live us i'm muting us i got a few things to share with you now to start with i mentioned to you that puget lowland is mostly islands made out of glacial deposits and many of them are drumlins and look who spent some time with randall carlson on his youtube channel jerome lessman and this is a two-hour program i'll show it to you again you go to the randall carlson website the scary randall carlson youtube channel and there's the title episode 47 drumlins and there's a whole team of people including randall carlson if you don't know who that is um google them and uh randall kept his mouth shut and jerome went nuts for about two hours you have for abrasion by a glacier in other words if you think of a glacier the base of a glacier that's charged with all kinds of pieces of rock and other sediment as a pretty big piece of sandpaper so you want you want a heavy dose of jerome he did a great job jerome you did a great job with that and uh i hope you're invited back there was talk of you coming back so we're not talking about glacial stuff today but uh that was i think worth it uh just in case you don't know the pat miller story i was telling you about 2012 on my 50th birthday top of a column top of a column hello beautiful show sorry patrick yes the hammer's still down there but pat miller was inspired to create that piece of art and i will have that for the rest of my days pat thank you this is a daryl show so i want to show you some of the scenics created by chris smart who i made these programs with and uh we're going to talk about mexico and it's not our topic today we will be coming back to the san juans in december when talking about baja bc but consider this a a way to meet daryl a way to get some nice scenics of the san juan islands and also a little teaser to what's to come a month from now in our series discover the energy that drives a planet and builds mountains uncover buried treasure and see what makes mountains blow find out what shapes the top of the earth and explore the secret world balloon with me nick on the rocks deception pass the bridge at deception pass the views are incredible you can see all the way to mexico but only if you look down at the extraordinary bedrock below the bridge bedrock that formed in a deep ocean then was added to mexico and then made the long journey to northern washington look at this stuff kind of looks like ribbon candy doesn't it it's rock up to 160 million years old this stuff is from the deep ocean floor from the age of the dinosaur that's lopez constitution these chert layers are made of silica rich skeletons of tiny single-celled organisms called radiolaria they float for about a month in the ocean before they start sinking like diamonds deep in the earth the silica skeletons face incredible pressure from the thousands of feet of water overhead as a result the tiny skeletons are transformed into chart bands drone shots silica rich rocks that tell a deep ocean story is it possible that these rocks were accreted in mexico mount airy and then set north almost 2 000 miles here's daryl up until pretty recently we basically had paleomagnetic data there weren't good geologic arguments for where these rocks were and secondly how do you get them up 3 000 kilometers along the coast but but now just in the past several years the tridel zircon work where workers from university of calgary and elsewhere have have analyzed samples of the nanaimo group which is part of the san juan islands that'll come later found that the detrital zircons very likely were eroded from granitic rocks at the latitude of los angeles the mojave desert and so i think now this has caused a resurrection and interest in the baja bc hypothesis because it is a completely different line of evidence that you could use to argue and support the evidence comes in all shapes and sizes exotic looking bedrock like this all up and down the west coast of north america granitic mountains with a tropical paleomagnetic signature all the way down to little single grains of zircon minerals that are new kinds of evidence that tell us that rivers long ago in mexico traveled over bedrock like this it's now clear to many geologists that everything in western washington that's older than 50 million years ago was part of this baja bc movement anything younger than 50 million the cascades the lobbies of eastern washington the ice age floods that's homegrown deep ocean rocks that not only made it to dry land but also got sent packing almost halfway to the north pole are just another reason to enjoy deception past take part [Music] so that's the work of chris smart who works here at central washington university and i don't know when we're gonna film more of those we couldn't this year um i think that's enough i had a couple of our animations from the last couple of shows queued up but we've already seen those and we'll come back and visit those again but it's almost 3 30. it's time for some q a and we can get rid of this couple of jokers we have with us hopefully um and uh it's time for some q a thank you for still being with us um if you're new to us we do q a with upper case you caps lock and i try to answer a few questions boy that sun is i'm going to move this a little bit we'll try a little bit of this and uh and then we'll have a little happy hour here i'm popping the chat out like a boss right between the eyes uh i'm not a top chat guy i'm a live chat although i don't know what the difference is scrolling back we'll try to do a few oh we got trolls we're just ignoring the trolls okay hopefully hopefully we're focusing on what we're doing here what's the difference between a foot wall and a hanging wall they're just labels for two blocks of crust either above or below the fault so if the fault has an angle like this underground then there's a block of crushed above the fault and a block of crush that's below the fault hanging wall foot wall they're just labels for the blocks so that when those blocks start moving we can describe the block motion george how thick and how long are the slices of terrains and can you estimate how thick they started out great question george from iowa daryl told me in an email and i forgot to look that up less than a mile thick let's say that oh is that right hang on by the way as i'm looking for this email from daryl some of you have mentioned that you have a hard time joining us live because you can't find the live thing on my youtube channel i have a tip for you i think youtube recently changed it i don't think i'm doing anything differently but if you're frustrated finding the live link for an upcoming show go to my youtube channel it says home and then videos and then playlists if you click on playlists you'll find the nick from home playlists and if you're in that playlist lineup you'll see that live link i think that's right uh it's maybe not worth looking for you george but i'm going to give it two more seconds here of looking nope can't find it okay i've got the info but i i forgot to write it down sorry kyle why am i wearing shoes it's almost november kyle moto mining can you see the organisms in the church without insane equipment probably not but i'm not an expert there i don't know how they isolate those super tiny forearms and salinas is that the same thing i don't even know the biology of it but i think you need some pretty fancy equipment to see that stuff automatic scroll god there was a good one there too hang on hang on yeah eric so the san juan islands are basically an exotic terrain smorgasbord yeah a good way to say it sandy don't you have wonderful drawings of the sji naps by elizabeth orr i guess i don't sandy that's elizabeth and bill orr i didn't think to look in that book sorry sorry uh toughen up are there any clips with the naps i think so but i kind of forget what a clip is is that a window uh there'll be some windows in the show next time which way do those faults dip they dip to the what did we decide they dipped to the southeast did we relate cash creek to one of the san juan terrains yes we did we related cash creek to dead man bay peter you have mentioned northwest north america traces bumps with europe a few times do you know rough ages of when i can only find traces of crunches with south or east u.s peter when i talk about europe i mean that parts of europe bedrock were sliced away and sent our way i don't think i mean the opposite that we crunched with northern europe if i get your question correctly i'm trying to say and we'll have this again in the next show pieces of northern europe that left like an immigrant and and arrived here like an immigrant and arrived here as an immigrant i was i always screw those up uh papagino are the san juans part of the clockwise rotation there is some clockwise rotation today on some of those gps stations in the san juans yes but we're talking about thrusting between 184 million years ago and i failed to mention it then but i'll mention it now there's some metamorphic activity as well as we thicken the crust we create metamorphic rocks and as i understand it getting the ages on that metamorphic event getting ages on those metamorphic events helps us constrain when the thrust vaults were active david do you get thrust faults when continents collide yes but i don't know i don't think we there's no evidence is there that we had another continent here um again the timing is we're doing the compression with the san juan terrains beginning after the insular arrives i guess it still could be i need to keep thinking about that maybe it is driven by the insular the insular is not just going to kiss the shore it's going to continue to um well remember from karin and mitch's show the insular is hanging out fixed and we're plowing into the insular but is it really a 16 million year time of continuing to have the insular fight with the western edge of north america and again is it worth thinking about if we realize that there's a mexico story if you're trying to do the math on that it's too much for us today it's just too much for us today uh opiki would the thrush vaults operate at the same time or in sequence in time we don't know yeah that's what i emailed daryl last night about i don't think we have any kind of timing about all four thrust vaults active at the same time one at a time if so is it the thrust fault at the lowest part of the stack that was active before the youngest part according to daryl we don't have that and i believe him eric i just tried to answer that with metamorphic rocks i know of no thank you stephen i know of no stitching plutons in the san juans that help us with the accretion date there are some plutons in fidalgo island let's say but as i understand it those are when the island ark was active offshore judas why do some geologists think the same san juan terrains won't be found in northern washington well next time judas we're crossing i-5 and we're going to go into the foothills of the cascades spoiler alert we're going to find some of the same stuff so i'm not sure who you're talking about that doesn't think there's a continuation if you meant just my comment about how much is taquinia quinnelli etc that's a that's a longer answer and i don't know how to answer it right now a couple more we'll quit william were the thrust vaults in the islands the result of clock okay no the timing is wrong there's no evidence of clockwise wrote thank you for the question no evidence of clockwise rotation before 50 million years ago i think that's a safe statement i mean i was just teaching the clockwise rotation this morning again i don't care who's in the audience they love the idea of a clockwise rotation it's just one of those that just grabs people but we can't apply it here there's no evidence for any sort of clockwise rotation because the plate configuration i mean this it's we're talking about 100 million years ago not 50. 50 were recent enough that we kind of have a sense of which ocean plates were where a hundred as you saw last show we still don't have that uh sense okay now we're into okay so a toast to you and to thank you to you for joining us and being with us so late what was the day of the dead or something day of the dead cake he's going to drop it ladies and gentlemen hang on hang on patrick a special shout out to the clowns who are with us uh love to have you back uh and i only ask one thing that you give us your heart and you give us your mind i see you i know that you're here i see you i'd love to have you come back and we can learn together how about that i see you and i love you here's to your health how does this stuff get shipped halfway across the country and tastes like it was just made in your kitchen we are living in an amazing time here's to the health of your friends your parents your children and everyone in your community with an open heart everybody's invited this is an inclusive place this episode of nick from home brought to you by cupcake cabernet sauvignon yep stealing it from my wife again i gotta run to super one grocery store before she gets home from school this episode of nick from home brought to you by super one grocery store unlimited supply of cupcake wine here's to you delightful next time will be session n as we work through the alphabet together and we will be leaving the san juan islands interstate 5 and getting up into the foothills of the cascades looking at exotic terrain bedrock and basically asking can we find some of our four san juan island exotic terrains on the east side of i-5 and as we go up towards mount baker glacier peak etc that's next time you for joining us today hope you enjoyed this one on the san juan islands i love you and goodbye goodbye

Channel: Nick Zentner

Views: 18,104

Rating: 4.9394593 out of 5

Keywords: Nick Zentner, Darrrel Cowan, San Juan Islands, Fidalgo Island

Id: 6aNzp3XGMps

Length: 114min 26sec (6866 seconds)

Published: Fri Oct 30 2020