Henrys Fork Caldera: Yellowstone's Last Caldera Eruption Completely in Idaho

Подписаться 105 тыс.

Просмотров 165 тыс.

50% 1

Join geology professor Shawn Willsey as he takes you on a tour of the Henrys Fork Caldera, a ~20-mile wide caldera that formed 1.3 million years ago during a huge violent eruption that ejected 280 cubic miles of ash. This eruption was the second most recent of the three big Yellowstone eruptions over the last two million years.
00:00 caldera locations
00:20 intro, within the caldera
01:55 map of Yellowstone's three recent calderas (from my book, Roadside Geology of Idaho)
04:08 generalized model of Yellowstone caldera eruptions (also from same book)
09:25 tour of Henrys Fork caldera rim
11:15 intracaldera basalt flow
13:41 Mesa Falls Tuff along caldera flank (just outside caldera)
You can order SIGNED copies of my books that cover this area: Geology Underfoot in Southern Idaho (a whole chapter on this area) and Roadside Geology of Idaho. Purchase here: shawn-willsey.square.site/
Support these videos! Your generous support allows me to travel to these locations and create videos. Send support via:
PayPal: www.paypal.com/donate/?hosted...
or click on the "Thanks" button above.
or a good ol' fashioned check to:
Shawn Willsey
College of Southern Idaho
315 Falls Avenue
Twin Falls, ID 83303

Наука

Опубликовано:

10 май 2024

Ссылка:

Скачать:

Готовим ссылку...

Добавить в:

Мой плейлист

Посмотреть позже

Комментарии : 211

@shawnwillsey 9 месяцев назад

FYI: Graphics shown in video are from my two books, Geology Underfoot in Southern Idaho and Roadside Geology of Idaho. In fact, the content of this video is one full chapter in the Geology Underfoot book. You can order signed copies here: shawn-willsey.square.site/ or get from local booksellers or Amazon (of course).

@keithweiss7899 9 месяцев назад

A great explanation! I love Geology and almost majored in it in the 70’s. I went to Southeast Missouri State and they are in the area of the great New Madrid earthquake. So lots of geologists were there because of that. Very interesting, and I thank you!

@Vbluevital 7 месяцев назад

Simply love your content. Thank you for sharing.

@briane173 9 месяцев назад

I was up and down US-20 through Island Park- Yellowstone twice -- once 40 years ago, another about 27 years ago -- and had no idea whatsoever that I was driving over a massive caldera. There is so much geology going on in Idaho that I missed while I was living in Idaho Falls it's a shame now that I'm finding all this out so late in life. But now that I know, I have more incentive to head back to the place I called "home" for 4 years back in the 1980s and view it all with a different pair of eyes.

@shawnwillsey 9 месяцев назад

Better late than never. Enjoy!

@Vbluevital 7 месяцев назад

How lovely, we hope you do.

@briane173 7 месяцев назад

@@VbluevitalThere was a brief time when Island Park held the record for the all-time lowest temperature in the contiguous 48. I believe that was eclipsed either by West Yellowstone or Meacham Oregon, I'll have to look up the history.

@estherlwhittle7568 4 месяца назад

Yes. I lived in Idaho in the early 1960s in the Challis National Forest. We also traveled widely in Idaho.

@Anne5440_ 9 месяцев назад

Excellent lesson! What I enjoyed the most was the Mesa falls tuff road cut. As you came up to it I recognized that it is tuff. I then remembered seeing the same thing in '82 along the Toutle River at st Helen's. I was confused that day by what I saw. But I really knew nothing about it. This spot was just above the lahar level along the river. Your explanation here and the layers told me what I had seen on a smaller scale that day. Comparing the two places really helps me realize what a large eruption that had been of the Yellowstone hot spot. I'm still glued to the Iceland current eruption cams. This video has also emphasized to me how much more complex explosive eruptions are compared to fissure eruptions. Both are fascinating in their own ways.

@7inrain 9 месяцев назад

For the viewers used to the metric system: The Henry''s Fork Caldera eruption produced 280 km³ of ash, the Yellowstone Caldera had 1,000 km³ of ash and the Island Park Caldera eruption went off with 2,500 km³ of ash. The teeny, tiny Mount St. Helens eruption: 1 km³ of ash. Nothing to write home about. [/s]

@Anne5440_ 9 месяцев назад

But what St Helen's ash (2 3/8 inches) made a big impression on my life. No one wants to go through a super eruption for sure.

@mickie7873 9 месяцев назад

Thank you for your overview of this caldera area. We midwesteners have such restrictive clues to this type of topography. I lived in Wyo. for 5 yrs.; got to visit Craters of the Moon and there abouts. The magma building period of our planet is so interesting. I'm enjoying all your videos.

@PopsMdub 9 месяцев назад

You are always showing us the coolest stuff and explaining them in the most understandable way. That's why I love supporting you when I can.

@shawnwillsey 9 месяцев назад

I appreciate that!

@williamdice2546 9 месяцев назад

Thank you for covering this area. I was in the area visiting a relative and she called the quartz crystals diamonds. I knew they were not, but I was not sure what they were. You answered my question while providing the background to how the area formed. Please continue making videos!

@shawnwillsey 9 месяцев назад

I will. Thanks for watching.

@ragnapodewski4694 9 месяцев назад

It is a complete description of the Supervolcano theory, Yellowstone is the unique place, where this theory is sure. Most caldera forming eruptions are different. America is lucky to have such a moving Hotspot under thick crust of a continental plate.

@leswoodburn5764 9 месяцев назад

@@ragnapodewski4694 It maybe that the hot spot is stationery and the land mass is moving in a westward direction.

@ragnapodewski4694 9 месяцев назад

That is the point,I have said!

@paulwestenskow7302 9 месяцев назад

Hi Professor Willsey! This is one of the best presentations I have seen about geology in the Island Park area! I have to confess that I have binge-watched this serval times. There is just so much there to learn and understand! From now on, whenever I drive up there ( I am from Pocky), I will look at geology in a different light! Thanks again for this excellent presentation!!!

@shawnwillsey 9 месяцев назад

Wow, thanks for the high praise. Happy to share what I know and love. Keep learning.

@beachbum200009 9 месяцев назад

I really enjoyed this video!!! Thank you Shawn.

@shawnwillsey 9 месяцев назад

Awesome. Glad you liked it.

@altheacraig2904 9 месяцев назад

I know about it because a Geology Professor at Washington State University in Ellensburg, Washington named Nick Zentner has taught me all about things like plate tectonics and a lot of other things. Also that Yellowstone is a HOT SPOT just like Killowaya in Hawaii!

@conniead5206 9 месяцев назад

That would be Central Washington University (CWU). I have learned a lot from Nick Zentner too. He makes Geology interesting.

@angelalewis4213 9 месяцев назад

@@conniead5206he does, but so does Shawn!

@craighoover1495 9 месяцев назад

Thank you for this. I have a passing familiarity with this area in that years ago I "passed" over it for work ventures related to plants and animals in forests and waterways. Looking at it now and thru the lens of geologic time lends a perspective that is new and welcome to me.

@naoakiooishi6823 9 месяцев назад

Thanks, as usual. and I personally want to know more about Colombia River Basalt as it was related to "basin & range" expansion mvement

@altheacraig2904 9 месяцев назад

Ask Nick whom I mentioned a few seconds ago

@godngunclinger 9 месяцев назад

thank you for including the GPS coordinates in the video I went ahead and researched the coordinates on google earth all around the outside of the caldera streams run every point of the compass🤠👍👍

@shawnwillsey 9 месяцев назад

Yeah. It is by far the best preserved and most conspicuous landscape of the three recent caldera forming eruptions. The drainages are indeed radially, mainly on west and south side of caldera.

@jessespillman6754 9 месяцев назад

I have spent quite a bit of time in that area. Absolutely love it and love the geology. When I'm there i wake up on the edge of the caldera and sit and watch the sun rise over the mountains, watching sunlight fill the caldera acting like the magma that once rose from the depths below.

@natcatsfarmlife 5 месяцев назад

I absolutely love the simplicity of “Let’s take a seat on the trail and have a quick lesson!” The clipboard and paper spoke to me. Felt like we were sitting with you on the ground reading along! Thank you for sharing with us.

@user-wk1mw9nj3i76 4 месяца назад

I agree!

@cribbsprojects 9 месяцев назад

Explosive potential also relates to the amount of water present... Great explanation of the varied igneous geology, eruptive lavas we find in this location as well as, say, the San Francisco Volcanic Field further south.. Keep up the good work. Your videos spread the geo knowledge far and wide... in the same way that the Roadside Geology books have done for so many years.

@shawnwillsey 9 месяцев назад

Thanks so much And as an aside, I co-wrote the updated and recently released Roadside Geology of Idaho. You can get a signed copy here if interested: shawn-willsey.square.site/

@ja6995 9 месяцев назад

Seeing new uploads from this channel is really satisfying. I'm a fan at this point. Really great stuff

@shawnwillsey 9 месяцев назад

Hey thanks so much and welcome aboard. Enjoy the existing videos and look for new ones soon!

@Rachel.4644 9 месяцев назад

Another good one, Shawn, thanks. Your Guides are so practical and useful! Looking forward to exploring more of Idaho.

@2flight 9 месяцев назад

Another outstanding field trip. Thank you!

@lawrencetaylor4101 9 месяцев назад

Merci beaucoup. One of my favorite memories of my time in Wyoming was taking a Geology class in a Community College. My only regret was being colour blind. Great lecture, Professor.

@lars277 9 месяцев назад

I once watched a show or a video about how the Yellowstone caldera volcano actually started down by Sacramento, CA, then each successive eruption it moved northeast to its' present location in Yellowstone. They said there was at least 12 eruptions that they could verify by satellite pictures. We are talking about 40 million years that it took to get to its' present location.

@papadopp3870 9 месяцев назад

That is an amazing story. Of course, for folks just getting into amateur geology, the hotspot didn’t move, the track we see today is the track of continent moving over the hotspot.

@stephenmorton8017 9 месяцев назад

excellent. thanks 'heaps' for the overview.

@michaelgraham6682 9 месяцев назад

Hi Shawn thank you very much for this video and the one on Upper Mesa Falls. We are travelling from Ireland and will staying in this area in about 10 days time. The content is perfect for what I am aiming to see while we are here. Thank you for all your efforts posting the videos they are fascinating. Take care

@shawnwillsey 9 месяцев назад

Awesome! Enjoy your travels. I highly recommend my books, Geology Underfoot in Southern Idaho and Roadside Geology of Idaho, as handy companions to help you find and understand the geology as you travel. Let me know if your travels bring you through Twin Falls.

@michaelgraham6682 9 месяцев назад

@@shawnwillsey Thank you Shawn appreciate it, I sent you a quick email

@BoltonLass 9 месяцев назад

A very informative and interesting video.

@emilu5425 4 месяца назад

Thanks for this most illuminating lecture on what most of us just pass by, without reflecting the least what the rocks might tell us. Prime enlightenment.

@mattbillenstein 9 месяцев назад

Very good sir - as I pass through these areas in the west, I very much like understanding a little bit of the geology and topography.

@Riverguide33 9 месяцев назад

Thanks for the vid…and the great illustrations. 👍

@shawnwillsey 9 месяцев назад

Graphics are from my book, Roadside Geology of Idaho.

@michaelgeorgemcdonald5927 9 месяцев назад

Hi again! Excellent video. Really enjoyed it. You'd be happy to know that from watching your previous videos I was actually able to easily follow what you were describing! Quality education Professor!

@shawnwillsey 9 месяцев назад

Awesome news. Glad to know that my videos have helped you learn.

@johnzinkowski6834 19 дней назад

Terrific presentation; clear visuals, enthusiastic explanation of technical details, and your pacing was perfect. As a novice I had no trouble following along. Thank you.

@davidk7324 9 месяцев назад

Outstanding. Another trip to the area is on my agenda. Thanks Shawn.

@shawnwillsey 9 месяцев назад

Awesome. This region offers so much geologically. I have more places to go for videos still too

@d.gregorybrown7779 9 месяцев назад

It is so cool that the pyroclastic flow stopped before crossing the road. Great video.

@shawnwillsey 9 месяцев назад

Glad you enjoyed it!

@quill444 8 месяцев назад

Yes, roads built in the past few hundred years form excellent boundaries, often strong enough to prevent any lava from half a million years ago from flowing over them! - j q t -

@d.gregorybrown7779 8 месяцев назад

wow, modern engineering solving problems happening hundred of thousand of years ago, life is good@@quill444

@harleyanne3720 Месяц назад

@@quill444😅

@micheleupchurch3725 8 месяцев назад

Thank you!❤ You always have such great information and on site!

@sgtpepperz25 9 месяцев назад

Great explanation, thank you!

@mistysowards7365 5 месяцев назад

Glad you did this. Not a lot of videos on the older eruptions. Thanks

@schitz240sx 9 месяцев назад

I just did a road trip out to Yellowstone. Part of my trip was on US 20, its awesome to watch this video.

@theoneyoudontsee8315 2 дня назад

this is awesome thank you Shawn!

@susannell544 2 месяца назад

You did a very nice video ....a first time for me that you included all three! Bravo👏💕

@booshday 13 дней назад

I've lived in southeast Idaho for over thirty years and your videos are awesome and have taught me so much about the geology of the snake river plains and surrounding areas. I would love to see a video on the hells half acre volcano area in-between idaho falls and blackfoot.

@Toasterleavins12 9 месяцев назад

This is such a great video, thank you!!!!!!

@m.j.mateyka7350 8 месяцев назад

I lived inside the caldera for four years when stationed at the Island Park Ranger Station. The whole area was geologically interesting. I put up a timber sale along Thurmon Ridge which is the common edge of the Henry's Fork and Island Park Calderas. (It was a salvage sale that harvested trees killed by a mountain pine beetle epidemic that stretched from Montana to the escarpment North of Aston.) There had been a salvage sale in the area that harvested over a 1000 acres of wind thrown trees. They were blown over by hurricane force wind in the lat 1960's. My wife had a plastic raised relief map that really showed the calderas. (Ashton, ID 1 in 250,000) The Moose Creek Plateau basalt flow covered much of the Island Park Caldera all the way into Idaho. There was a huge obsidian outcrop along the Fish creek Road. Locals said that Native Americans came a long way to get the obsidian for projectile points. You should do a video on Upper and Lower Mesa Falls on the warm River that are exceptionally scenic.

@m.j.mateyka7350 8 месяцев назад

Oops. Just got further down the list of your videos and see that you have one on Upper Mesa Falls.

@shawnwillsey 8 месяцев назад

Thanks!

@brittshepard9317 9 месяцев назад

Thanks, looking forward boondocking there and watching your video and reading your book.

@robertmeyersMeyers-cm9fy 2 месяца назад

You’ve got me super stoked about Geology. All your videos are great. I live in Hood River Oregon and was wondering if you have any videos on the Columbia River Gorge or Cascade Mountains.

@leor9252 9 месяцев назад

I learned more from this video than i ever did in geology class in school.

@shawnwillsey 9 месяцев назад

Thanks for watching and learning with me.

@brookeshaffer4377 9 месяцев назад

Thanks for a great show Shawn.Much appreciated.

@shawnwillsey 9 месяцев назад

You bet!

@sheilatruax6172 20 дней назад

Professor, thank you for your time. I am much more familiar with composite cones,Vesuvius, Eatna, the Peruvean peaks, Popcotapetl, the Cascades, etc. The hot spot shields are only familiar through Hawaii,and, now Iceland. Thank you for your updates on the activity in Iceland. Between you and Gylfi , I think I'm getting the whole picture. I learned from Prof Zetner, in Washington, about the successfully older calderas that track across to CA. And then a few slightly north. These are so interesting, I can't get enough!!

@jakelbies 8 месяцев назад

I live in Ashton - so cool to understand why the rock and soil looks like it does. Thanks for the info!

@shawnwillsey 8 месяцев назад

You bet!

@lisaloy2011 9 месяцев назад

One of my favorite videos that you've done.

@shawnwillsey 9 месяцев назад

Wow, thanks!

@ahmedkunbargi8096 9 месяцев назад

Oh hell yeah. One of the few channels i got notifications turned on for. Thank you Shawn! You are goated.

@shawnwillsey 9 месяцев назад

Awesome! Thanks for being a fan of my georamblings and geoventures.

@sraiken 9 месяцев назад

Love geology. Excellent lesson, thanks

@drmichaelshea 9 месяцев назад

Thank you, Prof. Willsey.

@shawnwillsey 9 месяцев назад

You are very welcome. Thanks for your kind donation.

@loisstanford8736 5 месяцев назад

Fascinating ❤

@d2sfavs 3 месяца назад

im really beginning to enjoy your videos so fascinating the size of volcanoes

@robertmeyersMeyers-cm9fy 2 месяца назад

You’re a rockstar! Great video, thanks for posting.

@nitawynn9538 4 месяца назад

I find this really interesting. Thanks.

@BowlesTroy 3 месяца назад

OK Shawn, I'm hooked. I find myself watching certain videos over and over again, sometimes 3-4 times so that I can: 1. Get all of the information in the first place. 2. Look again with new eyes after getting more information that you've given elsewhere. You're a stupendous educator. Aristotle would have been impressed.

@shawnwillsey 3 месяца назад

Many thanks. Glad you enjoy.

@sarahb.6475 9 месяцев назад

I never would have guessed that the light loose "fluffy" ground / sandy looking stuff was ash! I would have presumed it was just dry old loose "dirt" (soil) of some type. And I have heard of pumice before but I had no idea they could be so big! Great video!!

@shawnwillsey 9 месяцев назад

Thanks. FYI-in my world, there is no such thing as "dirt". There is soil, sediment (sand, gravel, silt, etc.), rocks, and minerals.

@jadesea562 9 месяцев назад

👏👏👏👏❤️my mind couldnt have been more excited about the thorough diagram description and explanation!! ✨️🌟thank you!!

@shawnwillsey 9 месяцев назад

Glad it was helpful!

@gregrussell7704 9 месяцев назад

Excellent video Shawn, that is where we're planning to explore.

@shawnwillsey 9 месяцев назад

It’s an amazing area.

@6806goats1 9 месяцев назад

Thank you for this. I own a home near Blackfoot but I work overseas most of the time. Always good to learn about the area. I’ll be glad when I move back.

@ActinOut 9 месяцев назад

Better than my earthquakes and volcanoes college geology class.

@raymondimbro2769 9 месяцев назад

Very interesting and well explained

@noeljohanson1979 9 месяцев назад

Excellent!!!! Discussion!!!!

@kathiwright4849 9 месяцев назад

shawn - do you have videos ( or maybe covered in one of your books?) - about the river canton around malad? the dark blocks of rock above the river are stunning formations. this was a great vid, by the way. i never knew there were 3 separate calderas

@rjthurston5871 9 месяцев назад

thanks for a great video, also i really liked the paypal method of donating --this is the 1st time i have seen this type of method for supporting a you-tube channel, nice method, much better than patreon.

@shawnwillsey 9 месяцев назад

Thank you for your kind donation. I agree that the PayPal link is simple and effective.

@stevewhalen6973 7 месяцев назад

Thanks!

@marchcyr1811 9 месяцев назад

Cool thanks for the short lecture, Hope your book goes well,

@HollyLewallen-Smith 3 месяца назад

Thank you so much for sharing your research with the World. ❤🌎🌏🌍. Love ❤. Shared ❤. Saved on RU-vid ❤.

@causewaykayak 2 месяца назад

Yet again we get a lesson in How to look at everyday landscape. Roadside geology is a good name for this. Book sounds intetesting ... must find out if it ships to Ireland

@vickihubach4388 6 месяцев назад

"you knew it was going to be a rough day" and your "superhuman grip" made me laugh out loud! loved it, thanks!

@vickihubach4388 6 месяцев назад

(just got your book)

@shawnwillsey 6 месяцев назад

Glad you enjoyed it!

@joseangeltorresespinosa7997 7 месяцев назад

Excelente video didáctico, acerca de la petrologia en la caldera volcánica en el campo, esperemos más vídeos de estos fenómenos naturales, saludos desde México.

@shawnwillsey 6 месяцев назад

Gracias amigo. Encantado de que disfrutes de los videos.

@WayneTheSeine 5 месяцев назад

Absolutely amazing the story this material tells if you know how to read the book. I love the Island Park area....gorgeous place. They have great, world class fly fishing. I did notice that the invasive mullen plant has managed to eke out a living there as well. What a tenacious plant.

@daveisnothere 9 месяцев назад

The crater I am curious about is one I found while looking at google maps a few years ago. It is located just south of Blackfoot, ID at [ 43.104994, -112.343015 ]. If you look at google maps, either with the satellite view or terrain view it is obvious. I figure it was part of the Yellowstone Hotspot migration from about the same time as the Picabo Volcanic Field era.

@altheacraig2904 9 месяцев назад

See the comment I made just a few seconds ago about Nick Zentner and his talk about Yellowstone and the one in Idaho. He is worth watching!

@paulwestenskow7302 9 месяцев назад

Professor Wolsey! I don’t know if you take a request to do Geology shows,! Have you ever considered doing a program that would cover the Geology around in and Pocatello? Could you explain how we got the lava bed in Rosses Park? Could you explain, possibly what it was like when the Bonneville flood came in and went out the Inkom gap, what is the geology of scout mountain, and how that formed? I thought it was a volcano by shape just an idea for you. Thanks again for everything.!👍

@susannell544 2 месяца назад

I saw a video from a Professor in Washington State that did a video. He explained that it was actuality in Washington State and moved to where it is at now. The Caldera is 30 by 45 miles.

@evandean3944 9 месяцев назад

Hey Shawn, could you help me clarify how much ash a cubic mile is? Like, what density is the ash considered? Is the volume measured/estimated at the density it leaves the caldera during the eruptive process, or soon after it's airborne, or once it's in the stratosphere? It seems like it is going to be a lot less dense once aloft, and a single cubic mile of ejecta could be many in the sky. The unit a cubic mile, when applied to something that's changing from a burning solid into an aerosol, is confusing for me. Can you elaborate? Thanks!

@shawnwillsey 8 месяцев назад

Good question. I believe these estimated volumes are erupted ash volumes (uncompacted).

@noeljohanson1979 9 месяцев назад

The Hot Spot has never moved, it is plate tectonics that has carried the older erupting sequences into No. Nevada and Eastern Idaho. Future areas that will erupt over the Yellowstone Hot Spot are now in South Central Canada….NE Johanson MD

@RomoRooster 9 месяцев назад

What's cool is because the north American plate is moving east, there should be old Yellowstone caldera's dotted all the way to oregon

@LizWCraftAdd1ct 2 месяца назад

Yellowstone is fascinating.

@lawrencet83 9 месяцев назад

I'm curious, to the best of your knowledge when do you think the next eruption of any kind will and where might occur in either Idaho, Wyoming. or any other of the lower 48 states?

@shawnwillsey 9 месяцев назад

It's anyone's guess. Most likely would be a Cascade volcano eruption, possibly St Helens, Lassen, or South Sister. Another eruption at Craters of the Moon is likely. Less likely is the huge Yellowstone eruption that folks get super worked up about.

@Bigandrewm 9 месяцев назад

Concerning that last stage of the caldera eruption being basaltic flows: because the ash and tuff from the explosive eruption haven't been buried by basalt at the Henrys Fork Caldera, does this mean that there are still some forthcoming basaltic eruptions that can happen there?

@shawnwillsey 9 месяцев назад

Absolutely. The Pinehaven flow by Mesa Falls is only 29,000 years old and there may be younger ones (don't have map in front of me at moment). Future eruptions of basalt are very possible (and more likely than an explosive ash eruption). If this occurs in my lifetime, I'll be there!

@sarahb.6475 9 месяцев назад

"You'll be there??" Won't it instantly incinerate a whole bunch of people ? You'll be the only one running towards it. Sounds dangerous. I have heard there is a spot directly above the magma chamber in Idaho that keeps getting earthquakes.

@BretBerger 9 месяцев назад

A family member has a home on the hill above Ashton, adjacent to Highway 20. His basement slab shattered after a water pipe leak beneath the slab. I guess the tuff/ash has hydro-expansive properties?

@shawnwillsey 9 месяцев назад

Hmm, older ash layers might do this if ash is altered to clay and prone to shrink-swell. I doubt these young ash layers would expand much in water

@TrainLordJC Месяц назад

Excellent presentation again. A question came to my mind about the huge eruption of 2.1 million years ago? Was the planet at the time of that eruption already in this current Ice Age or could this eruption have dropped temperatures so much to influence the Ice Age, or do you think that it has nothing to do with the current Ice Age that we are in? Or did this Ice Age start as a result of North America and South America joining up around 2.5 million years ago thereby changing the Thermal Haline current and helping to start the Ice Age?

@kayakingirl7252 9 месяцев назад

O M G, I'm a beginning, self- taught geology lover. I'm so happy I found you! I'm headed to some family property on the Sun River, outside of Augusta, MT. I'm so curious about this area. Do have any good resources for me to check out so I can be a bit more informed? Thank you so much!!!

@shawnwillsey 9 месяцев назад

Maybe look at some published geologic maps or just Google things like "Augusta Montana geology" or "Sun River Montana geologic guide". Here is one thing I found with a quick search: pubs.usgs.gov/pp/0663b/report.pdf

@cacogenicist 6 месяцев назад

I'm curious how the previous magma chambers sort of migrate away from the current ones, as the NA plates moves -- are there discrete chambers, or a continuous line of increasingly crystalized felsic rock (in the case ofnthe upper chamber) extending to the E-SE of the current partially molten chamber?

@candui7278 9 месяцев назад

Nice rhyolite columns @ 11;30. Does that mean slow cooling?

@123goldhunter 8 месяцев назад

Is any of that ash fall fertile soil in any way? Could it be used for farming?

@shawnwillsey 7 месяцев назад

As volcanic ash weathers, it does become good farming soil. I don't know enough to go into too much detail.

@johnnash5118 9 месяцев назад

Hi Shawn, How do you explain the deviation of the West Snake River Plain from the YHS track? The WSRP continues West across Oregon’s High Lava Plains, with a string of calderas aging from East to West and ending at Newberry Caldera. The aging is the opposite of the YHS. Is that caused by slab rollback or perhaps a rift associated with the B&R extension?

@shawnwillsey 9 месяцев назад

You read my mind. Planning a video on this very topic. Can I keep you in suspense longer?

@shawnwillsey 9 месяцев назад

Also WSRP does not tie into high plains volcanic field in central idaho.

@Cinnemax77 9 месяцев назад

GreatVid!

@ragnapodewski4694 9 месяцев назад

We can see the slow wandering of the Hot spot to the East.

@SM4724_ 9 месяцев назад

Have you been to the crater rings near mountain home? Looks like a cool area near I84

@shawnwillsey 9 месяцев назад

I know of it but haven’t been yet.

@clintonturner5545 9 месяцев назад

If you remember, Ashley was a robot. In the movie Alien 😊. He was a company man.

@TheRobertsonsrus 9 месяцев назад

What is the name of the book that the graphics came from? Is that one of your books? Love your videos! Our road trips have not been the same since we discovered your videos 😊😊

@brianstevens3858 9 месяцев назад

I obviously can't share a link You tube being corporate controlled, but google this it will do the job "Since 1972, Mountain Press's Roadside Geology series has been providing geology enthusiasts with fascinating and accessible information for states and provinces in the United States and Canada."

@shawnwillsey 9 месяцев назад

Yes. Roadside Geology of Idaho. Similar graphics and a full chapter on this area is in my other book, Geology Underfoot in Southern Idaho. Available at Amazon or local stores or you can get signed copies from me. I love that my videos enhance your travels. Win-win.

@brianstevens3858 9 месяцев назад

Sidenote: I don't know which one Shawn uses.

@brianstevens3858 9 месяцев назад

I do note a subtitle on his map open at 2:01 Chelsea N. Feeney cmc Feeney websight listed.

@shawnwillsey 9 месяцев назад

My two books are: Geology Underfoot in Southern Idaho (whole chapter on Henrys Fork Caldera) and Roadside Geology of Idaho. Order signed copies here: shawn-willsey.square.site/ or on Amazon or from local booksellers.

@Michael-rg7mx 9 месяцев назад

All 3 eruptions were during the Ice Ages. I wonder if pressure flexing the plate had any effect. A few quadrillion tons of ice may have just squashed it.

@PaulAmicucci 9 месяцев назад

GPS coordinates - wonderful, now I know exactly what you are looking at, THANKS

@shawnwillsey 9 месяцев назад

Yes, trying to include these at beginning of each video along with Google Earth zoom. Spatial context is important. Especially with a global audience

@user-tk1rk7fi7b 8 месяцев назад

On the V.E.I. scale what was that eruption...was that a v.e.i. 7..or 8???

@shawnwillsey 8 месяцев назад

VEI 7

@HanoiHustler 9 месяцев назад

Is the lava flows in southern New Mexico. Valley of fire. Is that lava a ring fracture lava flow?

@shawnwillsey 9 месяцев назад

I do not think so. Looks like the lava came from Little Black Peak and filled part of the Tularosa Basin.

@HanoiHustler 9 месяцев назад

@@shawnwillsey I hunted the south end as a kid. There appears to be separate lakes and riffs of lava that just come out of the ground away from the main flow.

@lebowskiduderino89 9 месяцев назад

Hey Shawn, what are the chances of this thing going off anytime soon?

@shawnwillsey 9 месяцев назад

An eruption of basaltic lava is possible and much more likely than another explosive, caldera-forming eruption. Chances of either happening within out lifetime is quite low.

@freddyw4555 9 месяцев назад

Keep making these and come to Colorado. Buffalo peaks

@shawnwillsey 9 месяцев назад

I'll keep making the videos for sure. I love Colorado and wish it was closer. I have a few from western CO in my playlist if you look.

@markheaney 6 месяцев назад

If you could explain the Long Valley Caldera, California, that would be nice. I just found out that I live within its possible effective range, and that it is possibly extremely dangerous.

@shawnwillsey 6 месяцев назад

Video coming soon on Bishop Tuff in Owens River Gorge which is part of this story.

@markheaney 6 месяцев назад

Thanks@@shawnwillsey

@susannell544 2 месяца назад

There have been videos saying the Magma plume covers an area to New Mexico......not sure I really believe it yet after seeing Icelands activity,maybe it is true🤔