Be sure to LIKE and SUBSCRIBE. You can support my educational videos by clicking on the "Thanks" button just above (right of Like button) or by going here: www.paypal.com/donate/?hosted_button_id=EWUSLG3GBS5W8 or here: buymeacoffee.com/shawnwillsey
@@mikegyro Not all -- I'm continually having to be reminded to smash "Like;" I seem to have a mental block with this, which is unfortunate because it's Likes that propel the channel, not subs.
Rode through Salmon, Challis, White Bird, Riggins, Stanley, Craters of the Moon etc last fall with 2 of Shawn's excellent books describing what we were seeing. Great rocks, books, camping, hotels and hot springs. Shawn makes life much more interesting!
Nice one. Thanks. Thought immediately of the Challis / Borah Peak quake of 1983 and the impact on the geysers in Yellowstone from that. Fascinating stuff.
Very interesting, was this part of hot spot formation or further north than the hot spot would have been. I have also forgotten what age for the hot spot, I must be off base. I went to Challis once. I was big into skiing then. Summer vacation was side trips to ski areas to check them out. So I know we were north of the Snake River plain. Also, the Bonneville Flood was much later than the eocene (sp). I discovered the youtube geology when Mr Zentner was doing the eocene. I was totally new and confused. I need to go back and learn more about that time period. Soon after, I discovered your channel. Your talks about Idaho regions and time periods have helped me with Washington and Idaho perspectives. I lived and traveled in the northern Rockies, but that geology is mostly a blur. The diagrams from your book helped helped me understand the subduction change in the eocene. Thank you for expanding my understanding.
If I'm understanding it correctly, the latest theory being bounced around is the Challis magmas were a product of a tear in the subducting slab of either the Kula Plate or Farallon Plate, forming a slab WINDOW between the rolled-back portion and the de-coupled portion over which the continent moved westward. The orogeny occurring in the PNW and points east during the Eocene was, by all accounts, absolutely NUTS -- several flare-ups occurring as a consequence of NA's collision with the Siletzia terrane, which might have an association with why the slab tear and rollback happened in the first place. The chronology and morphology of the PNW is a jumbled up mess -- just about every process you can think of to create the Cascade Range as well as the Challis Volcanics. My brain hurts when trying to catalog all the movement, magmatic intrusions, plutonic uplift, tectonics and whatever else happened in Eocene time to make the PNW what it is today.
And the volcanic deposits are still impacting our world today! I did my undergraduate research on a human-impacted stream that ran over Challis volcanics, and as a result of that human impact, the stream ended up carving some large canyons in a short time
Very interesting. Had this video in my suggestion list today, one day after I watched the livestream with Nick Zentner and Basil Tikoff about the Idaho batholith and the different subduction models during the Cretaceous and the Paleogene which you were watching too if I'm not mistaken. So the science about the formation of these magma deposits isn't still settled if I understand yesterday's livestream correctly.
Hey Prof, so many rock formations to id. Lahar or Brechia, I couldn't tell. Interesting that you keep the formation energy requirements in your description. Useful and helpful. You were rocking Native eyewear in 2021. You might consider getting them to sponsor a vid or two with a discount code for your viewers. I've have a couple of pairs thanks to you.
This could actually be a debris flow down the side of the now gone volcano. It's a hodgepodge of material from blocks to pebbles, matrix supported, that flowed into place then set up like a concrete slurry pour.
I'm glad you are bringing back older videos. Some I am just discovering. Others I have seen but get new insights or discover points where I was mixed up.
I discovered Shawn about a year-and-a-half ago, presumably when he first started his YT channel and posted a few videos and they came up in my Recommended because I'd already been following Nick Zentner for years. Now, these two guys are my GO-TO teachers for everything geology, inasmuch as I live in the PNW and have lived in Willsey territory in the past as well as California. Their collab this past Sunday was an absolute treat -- essentially my dream team in studying geology. Were it not for Shawn I would never have known the complex geology under my feet when I lived in Idaho, and it has really opened my eyes to what an amazing place Idaho is. Lucky to have Nick because he's practically in my back yard and through him I've learned literally everything I know about Washington geology (including what awaits us the next time the Cascadia Subduction Zone produces another megaquake along the coast).
Very interesting. The presence of small crystals in the ash: HOW ARE THOSE CRYSTALS DIFFERENT FROM CRYSTALS THAT FORM IN MAGMA OR LAVA? THAT IS, IS THERE SOMETHING ABOUT THE SIZE, SHAPE OR COLOR OF THE CRYSTALS IN THE ASH THAT MAKES IT CLEAR THEY ARE PART OF ASH? Or is the ash identified first, and then the crystals secondarily? Thank you! Your segment on the Nick show: 5 stars out of 5!
I remember the discussion of the Challis magmas with Nick Zentner's crazy Eocene A to Z series. I'm not sure the old rollback model still is valid as from the Crazy Eocene series there seems to be some major clockwise crustal rotation and uplift exposing old crystalline core complexes at roughly the same time with the oceanic volcanic plateau Siletzia and Yakutat(the latter of which would be carried north with the Pacific plate). Notably there is evidence to suggest the plateau which has been geochemically linked to the Yellowstone hotspot was ridge centered, in that the LIP has a small but significant component of chemically Mid Ocean Ridge Basalt derived magmas mixed into the predominantly Ocean Island Basalt derived source magmas. This suggests a possible alternative magma source as compression becomes reversed into extension with the continent hitting a fixed ridgeline and the major onset of more prominent clockwise rotation. If as the work discussed in the A to Z Crazy Eocene and Baja BC series are anything to go by then there was likely a large Himalayan style orogeny that had been built by the major arc collisions over the late Mesozoic which would have started to get pulled apart. There is a bunch of crazy volcanic/igneous and metamorphic features from these times such as the absurd Heart Mountain slide associated with extreme explosive volcanism around what is today Yellowstone National park some 50 million years ago or the famous Devils tower monument made of a huge phonolite lava intrusion. If I remember correctly there was/is also some evidence for possible slab rupture/failure around that time too further complicating things but probably not simple slab rollback. There was at least one paper which was really critical of slab rollback and slab windows being used as catch all explanations for complicated geological situations we don't understand. Cool probable lahar type deposit!
Good stuff here. This video was from 2021 and was relaunched here. I agree much has been learned over the past 5-8 years and the rollback model is probably not the best one to present.
@@shawnwillsey And I'm sure that as new data comes in the story will continue to evolve since the story of the western US is a fascinating and rapidly evolving one. Figuring out how and where that northward translation during the Cretaceous and Paleocene transpressional subduction story played out will probably help fill in the gaps needed to understand the craziness in the Eocene where the Yellowstone Hot Spot and East Pacific Rise came into play While I'm not sure its 100% correct, I would be surprised if it was, Robert Hildebrand's model is thought provoking to say the least in terms of thinking at the scales geophysical processes might play out.
Enjoy the videos.....always follow on google earth as an armchair traveler. The only improvement I would offer is to slow your panning speed with the camera. Keep em coming!!
Be sure to LIKE and SUBSCRIBE. You can support my educational videos by clicking on the "Thanks" button just above (right of Like button) or by going here: www.paypal.com/donate/?hosted_button_id=EWUSLG3GBS5W8
or here: buymeacoffee.com/shawnwillsey
I gave it a thumbs up before it started, CAUSE you know it's gonna be awesome.
Don't we all do this?
@@mikegyro Not all -- I'm continually having to be reminded to smash "Like;" I seem to have a mental block with this, which is unfortunate because it's Likes that propel the channel, not subs.
So did I 😂😂
Great job Shawn, thanks always for hiking right up to the location to discuss the various geologic issues..........................293 like ..........
Rode through Salmon, Challis, White Bird, Riggins, Stanley, Craters of the Moon etc last fall with 2 of Shawn's excellent books describing what we were seeing.
Great rocks, books, camping, hotels and hot springs.
Shawn makes life much more interesting!
Thanks!
Thanks for supporting geology education.
I love seeing the landscape of Idaho, it was great living over there for awhile. ❤
Nice one. Thanks. Thought immediately of the Challis / Borah Peak quake of 1983 and the impact on the geysers in Yellowstone from that. Fascinating stuff.
Awesome work on Sunday on Nicks channel
I'm blessed to live in Challis
My first thought was pyroclastic flow but your explanation makes more sense. Thank you!
Very interesting, was this part of hot spot formation or further north than the hot spot would have been. I have also forgotten what age for the hot spot, I must be off base. I went to Challis once. I was big into skiing then. Summer vacation was side trips to ski areas to check them out. So I know we were north of the Snake River plain. Also, the Bonneville Flood was much later than the eocene (sp). I discovered the youtube geology when Mr Zentner was doing the eocene. I was totally new and confused. I need to go back and learn more about that time period. Soon after, I discovered your channel. Your talks about Idaho regions and time periods have helped me with Washington and Idaho perspectives. I lived and traveled in the northern Rockies, but that geology is mostly a blur. The diagrams from your book helped helped me understand the subduction change in the eocene. Thank you for expanding my understanding.
If I'm understanding it correctly, the latest theory being bounced around is the Challis magmas were a product of a tear in the subducting slab of either the Kula Plate or Farallon Plate, forming a slab WINDOW between the rolled-back portion and the de-coupled portion over which the continent moved westward. The orogeny occurring in the PNW and points east during the Eocene was, by all accounts, absolutely NUTS -- several flare-ups occurring as a consequence of NA's collision with the Siletzia terrane, which might have an association with why the slab tear and rollback happened in the first place. The chronology and morphology of the PNW is a jumbled up mess -- just about every process you can think of to create the Cascade Range as well as the Challis Volcanics. My brain hurts when trying to catalog all the movement, magmatic intrusions, plutonic uplift, tectonics and whatever else happened in Eocene time to make the PNW what it is today.
Really interesting, love these little "shorts"
And the volcanic deposits are still impacting our world today! I did my undergraduate research on a human-impacted stream that ran over Challis volcanics, and as a result of that human impact, the stream ended up carving some large canyons in a short time
Thank you Shawn ! Your videos are wonderful ! My wife and I love learning about the geology of places we ride our motorcycle 🏍️ ! Well done 👍 !
Very interesting...always great to delve into the geology of geographic areas .
Thx Shawn.
Very interesting. Had this video in my suggestion list today, one day after I watched the livestream with Nick Zentner and Basil Tikoff about the Idaho batholith and the different subduction models during the Cretaceous and the Paleogene which you were watching too if I'm not mistaken. So the science about the formation of these magma deposits isn't still settled if I understand yesterday's livestream correctly.
Thx Prof ✌🏻. Grt geo-ed adventure, as always.
Interesting as usual, thank you.
Thank you Shawn 😊 another fascinating lesson ❤😊
Always interesting Shawn.
That's an impressive melange of rock burger .
Wonder what would happen if I walked into Wendy's and asked to have one of their quarter-pound melanges.
5:22 the rock climber in me is thrilled at those hand holds 😂
WOW - Congrats on crossing into that 90,000 Subs!!
Hey thanks. I owe a lot of it to the great geo-learning community here.
Hey Prof, so many rock formations to id. Lahar or Brechia, I couldn't tell. Interesting that you keep the formation energy requirements in your description. Useful and helpful. You were rocking Native eyewear in 2021. You might consider getting them to sponsor a vid or two with a discount code for your viewers. I've have a couple of pairs thanks to you.
Not a bad idea. Hope you like their shades.
“Hands-On Shawn,” I coined it!
That’s a terrible name for a professor or anyone in a position of some sort of authority.
@@rh5563 So, you consider yourself in a position of authority over my fun comment, that Shawn loved, ok?!
@@johnnash5118 , he’s teaching our kids, bud. Fun comment or not, it’s a crappy name for anyone in a position of authority. Period.
The diagram at the 1:48 point looks similar to Range & Basin Geology, are they related.
I once played laharic in scrabble.
Hope you had a chance to visit Hemingway in Ketchum.
Enjoy your content.
The Cantankerous Cretaceous and Crazy Eocene.
Thanks Professor. And is today's word Trans-Challis for us Ewtoob University Students?
So my understanding is. The Challis volcanics was like the Cascade Range is today?
This could actually be a debris flow down the side of the now gone volcano. It's a hodgepodge of material from blocks to pebbles, matrix supported, that flowed into place then set up like a concrete slurry pour.
Can you please review Calico Ridge, Henderson, NV?
I found you though Nick zentner 👍
Hey great. Welcome aboard and enjoy the existing videos. This was an older one that I resurrected, edited, and reposted.
I'm glad you are bringing back older videos. Some I am just discovering. Others I have seen but get new insights or discover points where I was mixed up.
I discovered Shawn about a year-and-a-half ago, presumably when he first started his YT channel and posted a few videos and they came up in my Recommended because I'd already been following Nick Zentner for years. Now, these two guys are my GO-TO teachers for everything geology, inasmuch as I live in the PNW and have lived in Willsey territory in the past as well as California. Their collab this past Sunday was an absolute treat -- essentially my dream team in studying geology.
Were it not for Shawn I would never have known the complex geology under my feet when I lived in Idaho, and it has really opened my eyes to what an amazing place Idaho is. Lucky to have Nick because he's practically in my back yard and through him I've learned literally everything I know about Washington geology (including what awaits us the next time the Cascadia Subduction Zone produces another megaquake along the coast).
Very interesting. The presence of small crystals in the ash: HOW ARE THOSE CRYSTALS DIFFERENT FROM CRYSTALS THAT FORM IN MAGMA OR LAVA? THAT IS, IS THERE SOMETHING ABOUT THE SIZE, SHAPE OR COLOR OF THE CRYSTALS IN THE ASH THAT MAKES IT CLEAR THEY ARE PART OF ASH? Or is the ash identified first, and then the crystals secondarily? Thank you! Your segment on the Nick show: 5 stars out of 5!
Small xls - rapid cooling; larger crystals -- slower cooling (generally). The minerals present depend also on rock chemistry.
wheres the cool less known caves in this area or near pocatello
I remember the discussion of the Challis magmas with Nick Zentner's crazy Eocene A to Z series. I'm not sure the old rollback model still is valid as from the Crazy Eocene series there seems to be some major clockwise crustal rotation and uplift exposing old crystalline core complexes at roughly the same time with the oceanic volcanic plateau Siletzia and Yakutat(the latter of which would be carried north with the Pacific plate). Notably there is evidence to suggest the plateau which has been geochemically linked to the Yellowstone hotspot was ridge centered, in that the LIP has a small but significant component of chemically Mid Ocean Ridge Basalt derived magmas mixed into the predominantly Ocean Island Basalt derived source magmas. This suggests a possible alternative magma source as compression becomes reversed into extension with the continent hitting a fixed ridgeline and the major onset of more prominent clockwise rotation. If as the work discussed in the A to Z Crazy Eocene and Baja BC series are anything to go by then there was likely a large Himalayan style orogeny that had been built by the major arc collisions over the late Mesozoic which would have started to get pulled apart. There is a bunch of crazy volcanic/igneous and metamorphic features from these times such as the absurd Heart Mountain slide associated with extreme explosive volcanism around what is today Yellowstone National park some 50 million years ago or the famous Devils tower monument made of a huge phonolite lava intrusion. If I remember correctly there was/is also some evidence for possible slab rupture/failure around that time too further complicating things but probably not simple slab rollback. There was at least one paper which was really critical of slab rollback and slab windows being used as catch all explanations for complicated geological situations we don't understand.
Cool probable lahar type deposit!
Good stuff here. This video was from 2021 and was relaunched here. I agree much has been learned over the past 5-8 years and the rollback model is probably not the best one to present.
@@shawnwillsey And I'm sure that as new data comes in the story will continue to evolve since the story of the western US is a fascinating and rapidly evolving one. Figuring out how and where that northward translation during the Cretaceous and Paleocene transpressional subduction story played out will probably help fill in the gaps needed to understand the craziness in the Eocene where the Yellowstone Hot Spot and East Pacific Rise came into play While I'm not sure its 100% correct, I would be surprised if it was, Robert Hildebrand's model is thought provoking to say the least in terms of thinking at the scales geophysical processes might play out.
Enjoy the videos.....always follow on google earth as an armchair traveler. The only improvement I would offer is to slow your panning speed with the camera. Keep em coming!!
Older video where I was more frenetic with camera. Hopefully getting better with time.
✌
"50 million years ago"... not biblical.
Do these younger from east to west?
Thanks!
Thanks!