*SLAB FAILURE?* Fear not. Plutons are on the way! Your terranes will be stitched together in a blink of 100 million years, leaving you with that "exotic" feeling. CWU, thank you for the gift of Nick Zentner's live streams. Long live Wellington!
I’m currently studying a masters, quoted Nick in a paper I wrote and would love to write a thesis on these livestreams, but my major is music, not geology
I love this show! It was so satisfying the way you presented today, felt like my blanks were scientifically being filled by the evidence you presented. All the previous shows are coming together!! Thanks to my TV professor Nick, now, I can follow you good enough to enjoy the Exotic Terrane development.😃💗 I surely hope a lot more people/scientists gather more field data on understanding Baja BC the clockwise rotation, so that we can further prove the period and the duration of the westward subduction and the collision into the INS around 100ma. I also hope it keeps you excited so that we can keep entertained by you with more of geological findings, thank you, Ned!!😘❤
I think that plutons are like crystalized bubbles! When NA collided to INS with the westward subduction, it teared a slab off around 100ma according to your newer findings. While it was happening the NA forced magma to bubble up...sort of! That's why all the plutons around that time is on the west coast, the west side of the old margin! ....It would make sense to me. And, I would think that the westward subduction would've switched to the eastward subduction around 50ma when the accretion of all the Exotic Terranes was finished...
Watching these for the first time in late '21/early '22- this was a fantastic episode. Having just completed almost 50 episodes, this one is especially poignant and for me as a rock climber, I can't wait for the Baja to BC episode up next!! -climber Josh
I've been bingeing these since I'm stuck in quarantine with covid (double vacced and was perfectly fine after three days of fever). a week ago i had no idea what plutons are. and yet when you mentioned what we're (are? were?) doing here, i felt really excited. Oh, boy, PLUTONS! I'm impressed with your teaching techniques.
Nick Happy New Year to you and yours. Just discovered your stuff in the last week or so. You are a great teacher. I am 60 and if I had a teacher like you when I was younger. My life would have taken a different direction.
Nick, I hope you can read this, I just flew from Seattle to So Cal and we flew over Nev and the California Coastal Range. For the first time I recognized the Nevada Basin & Range (I tried to take a picture but it didn't turn out) and what looks like the squeezing of Cal Coastal Range. I got excited seeing all of that. Thanks for the education you've given me over the past year. You are awesome.
Thanks Nick, as always. Just catching up now, and I'll have to finish tomorrow evening. Life is full of speed bumps... Very glad to have your voice in the midst of it.
One thing seems certain with the slab break-off, the part that is left unbroken will be released from most of the downward force the broken-off part was exerting and will spring back up like a diving board after the diver leaves. It would likely progress from the break-off line westward, much as the plutonic activity in the Eocene age timeline would suggest.
Thank you Nick for your work in that part of the States. My local geology was a boring bit of Triassic with a Ordovician horst that was just a lump of quartzite. Well, our local geology group started looking at this on the ground 12 years back, and guess what ? Its not boring ! There are thrusts, strike slip faults, a new Silurian/Ordovician uncomformity ! The boring quartzite is many differnt despostional environments from distal to proximal deep and shallow water !
Do failed slabs create higher pressure in subduction zones that raise the viscosity of lava that comes to the surface? Any implications for the fissures further east in Washington? Btw, thanks for all you do Dr. Zentner. You're truly a positive inspiration in a very confusing time.
I understand the frustration with the noise muffler boy makes! We had one in my past neighborhood and i got to the point of hating him and dreaming about stuffing potatoes in his muffler pipe. It was so loud it woke us up at night regularly! He was in and out more than anyone within blocks. I am an artist and his backfires and noise caused many a mishappe on my work. i got to calling him names not suitable for this dissertation. Moving solved my problem with him and I finally forgave myself for sending hate his way. but honestly does anyone have the right to disturb everyone's peace?. I say no, there should be limits established in neighborhoods especially with cars, motorcycles, drums, loud music, barking dogs.
I loved the rant about it being complicated. Slab failure doesn't seem very complicated to me though, it makes sense to me. A fault line means there is failure of something. Cracks in the sidewalks and roads and buildings are signs of failure. Bridges and dams can have failure. The crust cracks as well and wouldn't do so without something failing. I think about it like magma vs lava (underground or above)- subduction is described as happening underwater, but a thrust fault is similar but above water, but still a failure there. When it's softer materials against harder materials, it makes a difference (weaker stitching). It also makes sense that the Sierra Nevada is not related because of the type of sage. Also interesting is the paleo-mag rotation. There are 3 peaks around me that have curved tops. One is west of Omak (between Omak and Darrington) and curves northward, one to the northeast of Omak that curves south-ish and one to my southwest the tip curves westward-ish. Very interesting given the clockwise rotation and such. Great work on putting all of this together!
How do you not get overwhelmed when historical geology seems to be a hopeless mixture of materials? I am requesting advice on how to get past the complexity of the terranes, in particular.
Couldn't make the livestream for very long due to work, but I just want to say I have been following Hildebrand's papers for a while, and I think the main reason people don't take his work seriously is because, like Karin Sigloch, he is an iconoclast speaking out against the Orthodox Church of the Long-Lived Andean Margin. Also I think his work tends to have this air to it like he has everything figured out - one of his papers has in the title "Baja B.C. Resolved"... but it's not really resolved. Path to working out a possible resolution laid out? Maybe, but I think that kind of thing rubs people the wrong way. I don't really mind it personally, I think there are a lot of good ideas there, and a lot of research, and the attitude reminds me of another geologist I like, who has fought the establishment a lot in his life, Paul F. Hoffman. PS thanks for the "Clorox" comment... I agree... this is a huge problem with climate science, and science policy in general in this country.
Well, Hildebrand's model does in fact resolve the Baja-BC concept in that it identifies faults along which things moved northward and allows restoration of the 1300 km of northerly migration as shown by much of the paleomag. It uses real piercing points that match once the restoration is made. Everyone else just says that BC moved northward but never identifies any fault(s) nor ant possible piercing points. They just say it happened somehow. At least Hildebrand tries to show where and how the migration took place. Maybe adding a question mark after the title would have been more disarming? By the way, did you know that Paul Hoffman was Hildebrand's mentor? RSH
@@roberthildebrand9561 Yes, I had an idea of this from reading "Stirring the Pot" as well as Hoffman's "Tooth of Time" articles, and have noticed the prodigious amount of great work they have done together in the Canadian Shield. Both have an incredible craft and level of visual detail when it comes to mapping and diagrams as well. Please don't take my comment the wrong way, as I am personally as close to a "fan" as you might get in the geosciences, I am only attempting to understand the kinds of opinions and prejudices that others might have. Hildebrand's work, as with Hoffman's have real weight behind them, both in the amount of work that goes into them and in the "heft" of the intellectual questions they answer, not to mention both are intellectually courageous for challenging the orthodoxy. As for the comment about "Baja BC Resolved", I mostly agree with Hildebrand's conclusions myself, but I am most definitely not knowledgeable enough to know for sure. I think there is this tendency for much of Academia to be afraid of new "Big Ideas" like Hoffman's Snowball Earth and Hildebrand's Rubia and Baja BC conclusions, and to need to entertain "Multiple Working Hypotheses" - many careers are staked on Hildebrand being wrong :p. Ultimately, it's a farce because the same people vehemently defend another single idea, the Long-lived Andean Subduction model, and you can bet that when it becomes fashionable to switch sides they will do so and then say they agreed with Hildebrand all along, or that it was their idea. Kind of like how some of the early Plate Tectonics "pioneers" wrote papers against PT when it was still challenging and dangerous academically to align with it, and then in interviews for Plate Tectonics' 50 year anniversary, they act like they were there shoulder-to-shoulder intellectually with those who were originally lambasted and ostracized for their contributions... not going to name any names - I'm sure some people might understand to whom I am referring.
Yes, it does. Once the slab fails the leading edge of the partially subducted continental margin, which is buoyant and not happy in the mantle, rises and lifts up the upper plate, which erodes most of the arc. There also appear to be huge reverse faults that exhume the collision zone and shed sediment into the old back arc region. RSH
@@lotharschiese8559 this is why parts of the Himalaya are made out of granite. The granite was created during the collision process between India and Tibet and was exhumed after slab failure and detachment occurred. This is also why the Tibetan Plateau is so high (at least in part). Slab failure and detachment made the crust under it more buoyant and thus Tibet shot up in altitude. In the context of the Western Cordillera and the north Cascades slab detachment may well be to do with the crystalline core of the Cascades getting massively uplifted. In the last 200 million years there have been three examples of slab detachment occurring at various points for western North America: accretion of Intermontane Superterrane at 170 Ma; accretion of the Insular Superterrane at 100 Ma and accretion of Siletzia at 50 Ma. All saw choking of a subduction zone (whether eastern or western subduction), followed by slab detachment and a period of enhanced magmatic activity, followed by establishment of a new plate boundary (whether subduction zone or transform boundary). The surge in magnatic activity following accretion of the Insular saw things like the Coast Pluton Complex et al formed. Baja BC then transported the results north. The surge in activity following accretion of Siletzia was the Challis Magmas. Don't know what the surge of activity following accretion of the Intermontane at 170 Ma is called, but it'll be there as well.
Wouldn't magnetic fields get diverted down or along the dip of intrusions like dykes and sills, rather than following the general field trend to the magnetic centre of the Earth? Results must take a great deal of interpretation!
FASCINATING!!! I havent watched the whole alphabet yet, but this was the most intriguing one ive seen yet. So detailed! Wondering if the northward+clockwise motion created the transverse range (where i live)?
AT 56:35.....GO FOR IT NICK...You take multiple research information/data flows and create a presentation anyone may understand.In doing so you are considered a threat by academics with self esteem and status issues.....Yeah I'm being diplomatic.
@Nick Zentner I AM NOT SURE WHETHER OR NOT YOU WILL SEE THIS COMMENT: AFTER THE LOSS OF STREAM, I TOOK MY DOG FOR A WALK, CAME BACK 10 MINUTES BEHIND AND THEN HAD TO LEAVE BECAUSE OF a) THE ROOFERS b) MY HUSBAND c) MY OTHER DOGS AND d) MY NEWLY HOME FRESHMAN COLLEGE DAUGTER ALL INTERRUPTING MY FRIDAY LECTURE. SO I MISSED YOU LIVE. HOWEVER, I AM WATCHING THE REST OF IT NOW AND YOU STRUCK A CHORD WITH THE VOLLEYBALL BECAUSE THAT IS WHAT I DO! GREAT ANALOGY AND ALSO GREAT CHOICE OF VOLLEYBALL! BTW... TACH IS ALWAYS MY FIRST CHOICE! I WOULD KEEP IT RED AND BLACK FOR MY HOMETOWN LOL BUT EBURG IS A GREAT VB TOWNAS WELL! THANK YOU! YOU MAKE MY FRIDAYS! AND PS IGNORE THOSE WHOM WANT TO TRY TO BE SMARTER THAN YOU AND CONTRADICT YOU. THE MASSES LOVE YOU AND LOOK FORWARD TO EVERY LECTURE. ROCK ON, PROFESSOR!💖👍
PALEOMAGNETICS, IT'S NOT ALWAYS TAKEN FROM GRANITES. @1:18.32 I WAS SURPRISED TO LEARN WHAT MYRL BECK'S MIDDLE NAME WAS, AND HAVE BECOME A FAN OF HIS WORK. LOOKING FORWARD TO SUNDAY, KEEP THEM COMING.
These are created in Honor to Nick Zentner, our favorite Geologist. Shows perhaps what he does in his supposedly “off” time. *(Ha ..what is that He asks..)* See Nick at Home A-Z A = Series Set Up Hopefully more to foollow. Nick at Home A-Z A = Series Set Up ua-cam.com/video/VVPrmGOXV6M/v-deo.html Nick at Home A-Z T= Toilet Clog w/credits+bonus track ua-cam.com/video/98BrJCzkhIY/v-deo.html
Reading list: Robert S. Hildebrand, Mesozoic Assembly of the North American Cordillera. GSA Special Paper 495, Feb. 1, 2013 Robert S. Hildebrand & Joseph B. Whalen, The Tectonic Setting and Origin of Cretaceous Batholiths within the North American Cordillera: The Case for Slab Failure and its Significance for Crustal Growth. GSA Special Paper 532, Oct. 3, 2017 Robert S. Hildebrand & Joseph B. Whalen, Arc and Slab Failure Magmatism in Cordilleran Batholiths II: The Cretaceous Peninsular Ranges of Southern and Baja California, Paul F. Hoffman Series, Geological Science of Canada, Vol. 41, no. 4 (2014). (There is also a part I, with different focus) Myrl E. Beck, jr. & Linda Nason, Anomalous Paleolatitudes in Cretaceous Granitic Rocks. Nature Physical Science, Vol. 235, 1972, p. 11-13 Myrl E. Beck, jr., Discordant Paleomagnetic Pole positions as Evidence of Regional Shear in the Western Cordillera of North America. American Journal of Science, Vol. 276, June 1976, pp 694-712 Myrl E. Beck, et al. Northward Translation of Mesozoic Batholiths, Western North America: Paleomagnetic Evidence and Tectonic Significance, Geology - Geofisica Internacional, 2012 or maybe 1981? Not 100% sure about this paper. Sorry. Bernard A. Hausen & Myrl E. Beck, jr., Testing Terrane Transport: An Inclusive Approach to the Baja B. C. Controversy. Geology, Vol. 27, pp. 1143-1146, 1999 (found via Hausen’s faculty web site through wwu.edu) Bernard A. Hausen, Myrl E. Beck, jr., & Russ R. Burmester, Paleomagnetism of the Mount Stuart Batholith Revisited Again: What has been learned since 1972. American Journal of Science, April 2003, Geology Faculty Publication, Western Washington University And the work mentioned in Myrl Beck’s email: Physics of the Earth and Planetary Interiors, Coastwise Transport Reconsidered: Lateral Displacements in Oblique Subduction Zones and Tectonic Consequences. Vol. 68, Issue 1-2, p. 1-8, Aug. 1991 And to get the full link to the previously mentioned Sandra Wyld paper see Exotic V, pinned comment.
Nick is feasible that a land mass similar to the Hawaiian islands on the Farallon plate near the equator which the rotated clockwise until it collide with the west coast of the North American plate with the plate subducting under the North American plate and the plutons were scraped off the surface of the subducting Farallon plate and simply plastered onto the North American plate?
The shape of those plutons on the maps (collectively) is like the shape of that slab wall Karin found under the current east coast isn't it. Because that was the shape of the trench??
Nick, had a long day of emergencies, watching in reruns. Sound great, 5x5, no issues. A lot of it now making sense. Over 70 it sometimes takes time to sink in, ha. Subduction I see has a major part, but is the ring of fire actually a subduction around the entire Pacific?
My theory on the Peninsula and Sierra batholiths is that they're both the same batholith, and the only reason it's split into two is because of the Tranverse Ranges, which rotated clockwise about 90 degrees in the process of the San Andreas Fault growing and the Pacific Plate moving NW along the fault. If you go to Mt. San Jacinto where the Palm Springs Tramway is, the rock is almost exactly the same chemistry as the southern Sierra Nevada. The Transverse Ranges are just "in the way" after being rotated.
The idea of westerly subduction doesn't sound unreasonable given the difference in elevation from Death Valley (282 ft below sea level) and Mt. Whitney (14,505 ft above sea level) and the offset of the Baja section, especially with a higher sea level at the time.
@51:00 given the ages of the strips, with the western edge of Peninsular rocks older than the Sierra Nevada, might then suggest an oblique collision, slamming into the southernmost parts first, and only later the leading edge encountering the stuff to the north? Just spitballing here.
25° of northward latitudinal movement in 25 million years equates to an average of 3.5 inches per year. THAT'S FAST, geologically speaking! WOW!!!! Imagine the energy required to move that much mass that far at that rate! 😳
Palomagnitism is not an issue understanding, but how its measured is hard to visualize. How come Idaho's are so far east according to Beck? Would Sierra not have moved as much, due to clockwise rotation that Washington area has?
We need to make a step by step guide of how to use obs (open broadcast software). So you can use your phone as your camera and can create different scenes for you to use on your MacBook. Would save you some scrambling around.
Nick!!! I am listening through a nice stereo system... the point being is all along I cannot place muffler boy/man at 0.5X5 ever. Ditto airplanes etc... carry on
I feel like this is Geo advanced studies. I am wondering how I will ever remember these things. I am wondering if I need to start over with this series. LOL
I think you should strap on your seat belt and enjoy the ride like the rest of us. I am just happy to challenge my noodle again with facts I enjoy, learning about my backyard .
Hey Nick don't worry about the hecklers; there's always a couple of drunks up in the bleachers! And FWIW we can barely hear muffler boy or ambulance man if at all. You'll have more time for your content if you ignore them all. But what I really came here to mention is that @ 1:18:00 - ish with your stage prop you're rotating California anti-clockwise. I totally get the clockwise block rotation thing but I think your prop need to reworked to show this better. (Unless California truly did move anti-clockwise)
So at 56:46 Iwas saying he is you but in terms of the story from a technical side...COMPLIMENTING YOUR TEACHING STYLE AND HIS GRASP OF DETAILS .I am your age if i thought iIwas smarter Iwouldnt be watching...My question on top of pluton vs bottom of pluton paleomag was because of cooling age would it show northward progression Been watching and folowing long tim e Prof but ill sit in back and no longer ask question or post .SCIENCE TO ME IS TRUTH QUESTIONS ARE ALWAYS ASKED geologist cant even agree so i dont think my questions are clorox worthy ....A TOAST TO YOU NICK i would prefer to send an email as opposed to a public comment
It's Jun 2022 and Nick's rant still resonates with me even while I fully understood (a year and a half later) that the rant was triggered by a comment that may have been mis-read. I certainly remember Trump wondering aloud if injecting disinfectants might help with covid, so I appreciate that Nick expressed his frustration with some of the attitudes within the science community themselves which have helped bring us to this point where science-denial has become so common. I'm also sympathetic that it just so happened to be triggered by your comment Zigg, which clearly meant something very different. I'm watching the Exotic Terranes series for the first time right now, in between last winter's Crazy Eocene series, and next winter's promised Baja-BC series, which I'm waiting with bated breath to watch, and I hope you are still watching too, Zigg!! :)
The return of good audio... how about considering a mini-mixer (@7:30 ua-cam.com/video/fyFbI4yOOig/v-deo.html ) so you can select NICKINPUT1 then PCAUDIOINPUT2 and switch between inputs for the cozy fort? Fantastic audio today! Thanks Nick for more fantastic content!
I’ve loved all of your lectures for the past few years up until now. You brought politics into this one and it has no place. You want to make fun of Trump yet now we have a president that does not even know what room he is in most of the time. The nation elected a president that has early onset dementia and it was a scam election. Do people a favor and leave politics out of your future lectures
*SLAB FAILURE?* Fear not. Plutons are on the way! Your terranes will be stitched together in a blink of 100 million years, leaving you with that "exotic" feeling.
CWU, thank you for the gift of Nick Zentner's live streams. Long live Wellington!
Thanks for the series. You make Geology understandable for dummies like me. Great Teacher
I’m currently studying a masters, quoted Nick in a paper I wrote and would love to write a thesis on these livestreams, but my major is music, not geology
Thank you Nick. I so enjoy your teaching. Lots of ideas, lots of thinking, lots of questions. It doesn't get much better than this!
This was the best explanation of paleomagnetism I have ever heard. Thank you NIck. I know I speak for many.
I love this show! It was so satisfying the way you presented today, felt like my blanks were scientifically being filled by the evidence you presented. All the previous shows are coming together!! Thanks to my TV professor Nick, now, I can follow you good enough to enjoy the Exotic Terrane development.😃💗 I surely hope a lot more people/scientists gather more field data on understanding Baja BC the clockwise rotation, so that we can further prove the period and the duration of the westward subduction and the collision into the INS around 100ma. I also hope it keeps you excited so that we can keep entertained by you with more of geological findings, thank you, Ned!!😘❤
I think that plutons are like crystalized bubbles! When NA collided to INS with the westward subduction, it teared a slab off around 100ma according to your newer findings. While it was happening the NA forced magma to bubble up...sort of! That's why all the plutons around that time is on the west coast, the west side of the old margin! ....It would make sense to me. And, I would think that the westward subduction would've switched to the eastward subduction around 50ma when the accretion of all the Exotic Terranes was finished...
The paleomagnetism & the plate tectonics are so cool!! Thank you, Mr. Beck!!
Watching these for the first time in late '21/early '22- this was a fantastic episode. Having just completed almost 50 episodes, this one is especially poignant and for me as a rock climber, I can't wait for the Baja to BC episode up next!! -climber Josh
What a great teacher. Thank you.
I've been bingeing these since I'm stuck in quarantine with covid (double vacced and was perfectly fine after three days of fever).
a week ago i had no idea what plutons are. and yet when you mentioned what we're (are? were?) doing here, i felt really excited. Oh, boy, PLUTONS!
I'm impressed with your teaching techniques.
Nick Happy New Year to you and yours. Just discovered your stuff in the last week or so. You are a great teacher. I am 60 and if I had a teacher like you when I was younger. My life would have taken a different direction.
Really liked pics of sierra rocks looked like a folded slab of conglomerate . Nice breccias as well. Very cool . Thanks for the time you share !
Nick, I hope you can read this, I just flew from Seattle to So Cal and we flew over Nev and the California Coastal Range. For the first time I recognized the Nevada Basin & Range (I tried to take a picture but it didn't turn out) and what looks like the squeezing of Cal Coastal Range. I got excited seeing all of that. Thanks for the education you've given me over the past year. You are awesome.
Thanks Nick, as always. Just catching up now, and I'll have to finish tomorrow evening. Life is full of speed bumps... Very glad to have your voice in the midst of it.
One thing seems certain with the slab break-off, the part that is left unbroken will be released from most of the downward force the broken-off part was exerting and will spring back up like a diving board after the diver leaves. It would likely progress from the break-off line westward, much as the plutonic activity in the Eocene age timeline would suggest.
Thank you Nick for your work in that part of the States. My local geology was a boring bit of Triassic with a Ordovician horst that was just a lump of quartzite. Well, our local geology group started looking at this on the ground 12 years back, and guess what ? Its not boring ! There are thrusts, strike slip faults, a new Silurian/Ordovician uncomformity ! The boring quartzite is many differnt despostional environments from distal to proximal deep and shallow water !
This was among the best of your broadcast. And completely 5x5!
Your cozy fort is ok but that sunny enclosed porch is tops. Interesting topic Sir, and thank you for the talk.
Yesssss. Thanks, Nick. Have a medal. Cheers from Jane in England.
Do failed slabs create higher pressure in subduction zones that raise the viscosity of lava that comes to the surface? Any implications for the fissures further east in Washington?
Btw, thanks for all you do Dr. Zentner. You're truly a positive inspiration in a very confusing time.
I understand the frustration with the noise muffler boy makes! We had one in my past neighborhood and i got to the point of hating him and dreaming about stuffing potatoes in his muffler pipe. It was so loud it woke us up at night regularly! He was in and out more than anyone within blocks. I am an artist and his backfires and noise caused many a mishappe on my work. i got to calling him names not suitable for this dissertation. Moving solved my problem with him and I finally forgave myself for sending hate his way. but honestly does anyone have the right to disturb everyone's peace?. I say no, there should be limits established in neighborhoods especially with cars, motorcycles, drums, loud music, barking dogs.
hi from Portsmouth UK
I loved the rant about it being complicated. Slab failure doesn't seem very complicated to me though, it makes sense to me. A fault line means there is failure of something. Cracks in the sidewalks and roads and buildings are signs of failure. Bridges and dams can have failure. The crust cracks as well and wouldn't do so without something failing. I think about it like magma vs lava (underground or above)- subduction is described as happening underwater, but a thrust fault is similar but above water, but still a failure there. When it's softer materials against harder materials, it makes a difference (weaker stitching). It also makes sense that the Sierra Nevada is not related because of the type of sage. Also interesting is the paleo-mag rotation. There are 3 peaks around me that have curved tops. One is west of Omak (between Omak and Darrington) and curves northward, one to the northeast of Omak that curves south-ish and one to my southwest the tip curves westward-ish. Very interesting given the clockwise rotation and such. Great work on putting all of this together!
How do you not get overwhelmed when historical geology seems to be a hopeless mixture of materials? I am requesting advice on how to get past the complexity of the terranes, in particular.
Couldn't make the livestream for very long due to work, but I just want to say I have been following Hildebrand's papers for a while, and I think the main reason people don't take his work seriously is because, like Karin Sigloch, he is an iconoclast speaking out against the Orthodox Church of the Long-Lived Andean Margin. Also I think his work tends to have this air to it like he has everything figured out - one of his papers has in the title "Baja B.C. Resolved"... but it's not really resolved. Path to working out a possible resolution laid out? Maybe, but I think that kind of thing rubs people the wrong way. I don't really mind it personally, I think there are a lot of good ideas there, and a lot of research, and the attitude reminds me of another geologist I like, who has fought the establishment a lot in his life, Paul F. Hoffman.
PS thanks for the "Clorox" comment... I agree... this is a huge problem with climate science, and science policy in general in this country.
Well, Hildebrand's model does in fact resolve the Baja-BC concept in that it identifies faults along which things moved northward and allows restoration of the 1300 km of northerly migration as shown by much of the paleomag. It uses real piercing points that match once the restoration is made. Everyone else just says that BC moved northward but never identifies any fault(s) nor ant possible piercing points. They just say it happened somehow. At least Hildebrand tries to show where and how the migration took place. Maybe adding a question mark after the title would have been more disarming? By the way, did you know that Paul Hoffman was Hildebrand's mentor? RSH
@@roberthildebrand9561 Yes, I had an idea of this from reading "Stirring the Pot" as well as Hoffman's "Tooth of Time" articles, and have noticed the prodigious amount of great work they have done together in the Canadian Shield. Both have an incredible craft and level of visual detail when it comes to mapping and diagrams as well.
Please don't take my comment the wrong way, as I am personally as close to a "fan" as you might get in the geosciences, I am only attempting to understand the kinds of opinions and prejudices that others might have.
Hildebrand's work, as with Hoffman's have real weight behind them, both in the amount of work that goes into them and in the "heft" of the intellectual questions they answer, not to mention both are intellectually courageous for challenging the orthodoxy.
As for the comment about "Baja BC Resolved", I mostly agree with Hildebrand's conclusions myself, but I am most definitely not knowledgeable enough to know for sure. I think there is this tendency for much of Academia to be afraid of new "Big Ideas" like Hoffman's Snowball Earth and Hildebrand's Rubia and Baja BC conclusions, and to need to entertain "Multiple Working Hypotheses" - many careers are staked on Hildebrand being wrong :p. Ultimately, it's a farce because the same people vehemently defend another single idea, the Long-lived Andean Subduction model, and you can bet that when it becomes fashionable to switch sides they will do so and then say they agreed with Hildebrand all along, or that it was their idea. Kind of like how some of the early Plate Tectonics "pioneers" wrote papers against PT when it was still challenging and dangerous academically to align with it, and then in interviews for Plate Tectonics' 50 year anniversary, they act like they were there shoulder-to-shoulder intellectually with those who were originally lambasted and ostracized for their contributions... not going to name any names - I'm sure some people might understand to whom I am referring.
Does any rebound result from a failed slab ( geologic elevator)it must have some sort of effect.
Brilliant series Nick.
Yes, it does. Once the slab fails the leading edge of the partially subducted continental margin, which is buoyant and not happy in the mantle, rises and lifts up the upper plate, which erodes most of the arc. There also appear to be huge reverse faults that exhume the collision zone and shed sediment into the old back arc region. RSH
@@lotharschiese8559 this is why parts of the Himalaya are made out of granite. The granite was created during the collision process between India and Tibet and was exhumed after slab failure and detachment occurred. This is also why the Tibetan Plateau is so high (at least in part). Slab failure and detachment made the crust under it more buoyant and thus Tibet shot up in altitude.
In the context of the Western Cordillera and the north Cascades slab detachment may well be to do with the crystalline core of the Cascades getting massively uplifted. In the last 200 million years there have been three examples of slab detachment occurring at various points for western North America: accretion of Intermontane Superterrane at 170 Ma; accretion of the Insular Superterrane at 100 Ma and accretion of Siletzia at 50 Ma. All saw choking of a subduction zone (whether eastern or western subduction), followed by slab detachment and a period of enhanced magmatic activity, followed by establishment of a new plate boundary (whether subduction zone or transform boundary).
The surge in magnatic activity following accretion of the Insular saw things like the Coast Pluton Complex et al formed. Baja BC then transported the results north. The surge in activity following accretion of Siletzia was the Challis Magmas. Don't know what the surge of activity following accretion of the Intermontane at 170 Ma is called, but it'll be there as well.
Boy Nick your A'Z lessons with your maps surely would make a great teaching book
Wouldn't magnetic fields get diverted down or along the dip of intrusions like dykes and sills, rather than following the general field trend to the magnetic centre of the Earth? Results must take a great deal of interpretation!
Great show!!
FASCINATING!!! I havent watched the whole alphabet yet, but this was the most intriguing one ive seen yet. So detailed! Wondering if the northward+clockwise motion created the transverse range (where i live)?
AT 56:35.....GO FOR IT NICK...You take multiple research information/data flows and create a presentation anyone may understand.In doing so you are considered a threat by academics with self esteem and status issues.....Yeah I'm being diplomatic.
@Nick Zentner I AM NOT SURE WHETHER OR NOT YOU WILL SEE THIS COMMENT: AFTER THE LOSS OF STREAM, I TOOK MY DOG FOR A WALK, CAME BACK 10 MINUTES BEHIND AND THEN HAD TO LEAVE BECAUSE OF a) THE ROOFERS b) MY HUSBAND c) MY OTHER DOGS AND d) MY NEWLY HOME FRESHMAN COLLEGE DAUGTER ALL INTERRUPTING MY FRIDAY LECTURE. SO I MISSED YOU LIVE. HOWEVER, I AM WATCHING THE REST OF IT NOW AND YOU STRUCK A CHORD WITH THE VOLLEYBALL BECAUSE THAT IS WHAT I DO! GREAT ANALOGY AND ALSO GREAT CHOICE OF VOLLEYBALL! BTW... TACH IS ALWAYS MY FIRST CHOICE! I WOULD KEEP IT RED AND BLACK FOR MY HOMETOWN LOL BUT EBURG IS A GREAT VB TOWNAS WELL!
THANK YOU! YOU MAKE MY FRIDAYS! AND PS IGNORE THOSE WHOM WANT TO TRY TO BE SMARTER THAN YOU AND CONTRADICT YOU. THE MASSES LOVE YOU AND LOOK FORWARD TO EVERY LECTURE. ROCK ON, PROFESSOR!💖👍
PALEOMAGNETICS, IT'S NOT ALWAYS TAKEN FROM GRANITES. @1:18.32 I WAS SURPRISED TO LEARN WHAT MYRL BECK'S MIDDLE NAME WAS, AND HAVE BECOME A FAN OF HIS WORK. LOOKING FORWARD TO SUNDAY, KEEP THEM COMING.
These are created in Honor to Nick Zentner, our favorite Geologist.
Shows perhaps what he does in his supposedly “off” time.
*(Ha ..what is that He asks..)*
See Nick at Home A-Z A = Series Set Up
Hopefully more to foollow.
Nick at Home A-Z A = Series Set Up ua-cam.com/video/VVPrmGOXV6M/v-deo.html
Nick at Home A-Z T= Toilet Clog w/credits+bonus track ua-cam.com/video/98BrJCzkhIY/v-deo.html
Is there a place we can download the larger map he holds up, and colors in with Patrick’s pencils?
Reading list:
Robert S. Hildebrand, Mesozoic Assembly of the North American Cordillera. GSA Special Paper 495, Feb. 1, 2013
Robert S. Hildebrand & Joseph B. Whalen, The Tectonic Setting and Origin of Cretaceous Batholiths within the North American Cordillera: The Case for Slab Failure and its Significance for Crustal Growth. GSA Special Paper 532, Oct. 3, 2017
Robert S. Hildebrand & Joseph B. Whalen, Arc and Slab Failure Magmatism in Cordilleran Batholiths II: The Cretaceous Peninsular Ranges of Southern and Baja California, Paul F. Hoffman Series, Geological Science of Canada, Vol. 41, no. 4 (2014). (There is also a part I, with different focus)
Myrl E. Beck, jr. & Linda Nason, Anomalous Paleolatitudes in Cretaceous Granitic Rocks. Nature Physical Science, Vol. 235, 1972, p. 11-13
Myrl E. Beck, jr., Discordant Paleomagnetic Pole positions as Evidence of Regional Shear in the Western Cordillera of North America. American Journal of Science, Vol. 276, June 1976, pp 694-712
Myrl E. Beck, et al. Northward Translation of Mesozoic Batholiths, Western North America: Paleomagnetic Evidence and Tectonic Significance, Geology - Geofisica Internacional, 2012 or maybe 1981? Not 100% sure about this paper. Sorry.
Bernard A. Hausen & Myrl E. Beck, jr., Testing Terrane Transport: An Inclusive Approach to the Baja B. C. Controversy. Geology, Vol. 27, pp. 1143-1146, 1999 (found via Hausen’s faculty web site through wwu.edu)
Bernard A. Hausen, Myrl E. Beck, jr., & Russ R. Burmester, Paleomagnetism of the Mount Stuart Batholith Revisited Again: What has been learned since 1972. American Journal of Science, April 2003, Geology Faculty Publication, Western Washington University
And the work mentioned in Myrl Beck’s email:
Physics of the Earth and Planetary Interiors, Coastwise Transport Reconsidered: Lateral Displacements in Oblique Subduction Zones and Tectonic Consequences. Vol. 68, Issue 1-2, p. 1-8, Aug. 1991
And to get the full link to the previously mentioned Sandra Wyld paper see Exotic V, pinned comment.
do we know what plutons are below the puget sound? or the waters north of the straight of juan de fuca?
Nick is feasible that a land mass similar to the Hawaiian islands on the Farallon plate near the equator which the rotated clockwise until it collide with the west coast of the North American plate with the plate subducting under the North American plate and the plutons were scraped off the surface of the subducting Farallon plate and simply plastered onto the North American plate?
The shape of those plutons on the maps (collectively) is like the shape of that slab wall Karin found under the current east coast isn't it. Because that was the shape of the trench??
Sorry we missed this live yesterday. We were driving around enjoying the glaciated countryside between Stoughton & Paoli.
Nick, had a long day of emergencies, watching in reruns. Sound great, 5x5, no issues. A lot of it now making sense. Over 70 it sometimes takes time to sink in, ha. Subduction I see has a major part, but is the ring of fire actually a subduction around the entire Pacific?
The sound is better w/o the remote mic, although not by an order of magnitude.
Could the CPC have an origin like the fissure eruptions that covered Washington in basalt?
My theory on the Peninsula and Sierra batholiths is that they're both the same batholith, and the only reason it's split into two is because of the Tranverse Ranges, which rotated clockwise about 90 degrees in the process of the San Andreas Fault growing and the Pacific Plate moving NW along the fault. If you go to Mt. San Jacinto where the Palm Springs Tramway is, the rock is almost exactly the same chemistry as the southern Sierra Nevada. The Transverse Ranges are just "in the way" after being rotated.
The idea of westerly subduction doesn't sound unreasonable given the difference in elevation from Death Valley (282 ft below sea level) and Mt. Whitney (14,505 ft above sea level) and the offset of the Baja section, especially with a higher sea level at the time.
@51:00 given the ages of the strips, with the western edge of Peninsular rocks older than the Sierra Nevada, might then suggest an oblique collision, slamming into the southernmost parts first, and only later the leading edge encountering the stuff to the north? Just spitballing here.
25° of northward latitudinal movement in 25 million years equates to an average of 3.5 inches per year. THAT'S FAST, geologically speaking! WOW!!!!
Imagine the energy required to move that much mass that far at that rate! 😳
HOW THEY CHOOSE THE PLUTON TO GET THEIR SAMPLE TO SEE THE PALO-MAGNETISM?
My prospector father would point at some granites in south eastern Oregon. to say. "Sea floor, came up cold."
Palomagnitism is not an issue understanding, but how its measured is hard to visualize.
How come Idaho's are so far east according to Beck?
Would Sierra not have moved as much, due to clockwise rotation that Washington area has?
We need to make a step by step guide of how to use obs (open broadcast software). So you can use your phone as your camera and can create different scenes for you to use on your MacBook. Would save you some scrambling around.
curious, does Weyerhaeuser give you kick backs? with all the paper you use they should be atleast furnishing your paper, 😆 lol
If he stopped on your hill there and did a burnout, I would be duly impressed! Ya gotta Love it!
very high like to dislike ratio...cause...SCIENCE!
Whatever happend to Siletzia?
Photos from Gary showed up good.
I do like your videos, but there are just so many things for me to explore via my computer, that I don't have time, or energy for them all !
Nick!!! I am listening through a nice stereo system... the point being is all along I cannot place muffler boy/man at 0.5X5 ever. Ditto airplanes etc... carry on
That model of the broken slab looks like Oregon being added to North America.
I feel like this is Geo advanced studies. I am wondering how I will ever remember these things. I am wondering if I need to start over with this series. LOL
I think you should strap on your seat belt and enjoy the ride like the rest of us. I am just happy to challenge my noodle again with facts I enjoy, learning about my backyard .
Slab failure, not so sure. The loop shows the crust squeezing one off, so to me that's a success.
Darn it, missed the live stream.
Fruitcake plutons > fruitons, perfectly good geological term.
Paleo latitudes, finally, I get the idea
Is this a to z thing a video thesis? Can't wait till you get to California.. can't be separated from the baja bc story........
Hey Nick don't worry about the hecklers; there's always a couple of drunks up in the bleachers! And FWIW we can barely hear muffler boy or ambulance man if at all. You'll have more time for your content if you ignore them all. But what I really came here to mention is that @ 1:18:00 - ish with your stage prop you're rotating California anti-clockwise. I totally get the clockwise block rotation thing but I think your prop need to reworked to show this better. (Unless California truly did move anti-clockwise)
So at 56:46 Iwas saying he is you but in terms of the story from a technical side...COMPLIMENTING YOUR TEACHING STYLE AND HIS GRASP OF DETAILS .I am your age if i thought iIwas smarter Iwouldnt be watching...My question on top of pluton vs bottom of pluton paleomag was because of cooling age would it show northward progression Been watching and folowing long tim e Prof but ill sit in back and no longer ask question or post .SCIENCE TO ME IS TRUTH QUESTIONS ARE ALWAYS ASKED geologist cant even agree so i dont think my questions are clorox worthy ....A TOAST TO YOU NICK i would prefer to send an email as opposed to a public comment
I'm sorry. I read your comment incorrectly as it flashed by. Please continue to participate and ask questions. It was my mistake. Thanks for watching.
It's Jun 2022 and Nick's rant still resonates with me even while I fully understood (a year and a half later) that the rant was triggered by a comment that may have been mis-read. I certainly remember Trump wondering aloud if injecting disinfectants might help with covid, so I appreciate that Nick expressed his frustration with some of the attitudes within the science community themselves which have helped bring us to this point where science-denial has become so common. I'm also sympathetic that it just so happened to be triggered by your comment Zigg, which clearly meant something very different. I'm watching the Exotic Terranes series for the first time right now, in between last winter's Crazy Eocene series, and next winter's promised Baja-BC series, which I'm waiting with bated breath to watch, and I hope you are still watching too, Zigg!! :)
@@jensoboleski sure I watch but its been kinda tarnished with the drinking game audience so mostly thru replay
The return of good audio... how about considering a mini-mixer (@7:30 ua-cam.com/video/fyFbI4yOOig/v-deo.html ) so you can select NICKINPUT1 then PCAUDIOINPUT2 and switch between inputs for the cozy fort? Fantastic audio today! Thanks Nick for more fantastic content!
A lot of anger and frustration from Nick in this vid along with a reference to #45. He’s starting to crack...
I don’t think so.
1:29:25 hahaha
Get my emails yet? marked Family
Did you just start to say "frutons"? Fruit cake plutons.
I’ve loved all of your lectures for the past few years up until now. You brought politics into this one and it has no place. You want to make fun of Trump yet now we have a president that does not even know what room he is in most of the time. The nation elected a president that has early onset dementia and it was a scam election. Do people a favor and leave politics out of your future lectures
You are smart, you can follow geology. But really? Suck it up snowflake.
thin skinned?
extremely thin skinned