if you didn't see it, Nick Zentner did an interview at GSA with the cartographer from Mountain Press that made your Roadside maps prettier...

@shawnwillsey

2 жыл бұрын

Yes indeed. I did see it. Chelsea is awesome and was a vital part of our team (hence her name on the cover with the authors). I hope to work with her again in future.

This is a great video! Glad I found your channel!

@shawnwillsey

2 жыл бұрын

Thanks for subscribing. I love to share geology with folks.

Another great video! Thanks! Enlightened with this new information, we can't wait to go back and visit places we've already been with new eyes.

The craters of the moon is actually located in Southeastern Idaho, that's 18 miles from my home town!! Beautiful area!

Thanks for MORE Craters of the Moon. Great xenolith stories - I am not getting anything done watching your vids😲

Great series of videos ... very much appreciated.

@shawnwillsey

2 жыл бұрын

Thanks for watching. I really love doing these.

Totally appreciating all of your videos since discovering your channel a couple of months ago. Highly informative and very articulate as you wander around explaining and educating. I am Australian living next to the Mount Gambier volcanic complex and have VW'd from the top of Alaska to the bottom of South America back in the 80's before I got myself educated in geology. Seeing your videos and those of Nick Zentner shows many geologic features that I missed out on but through these videos I have at least become more informed and educated about our fascinating planet. Thanks so much again. Cheers from the Train Lord in South Australia.

@shawnwillsey

Жыл бұрын

Awesome. Thanks for sharing. Glad you enjoy my content. Hope to get to Australia some day.

Love volcanic structures. Fascinating those zenoliths ( what a nice word ). I note an apparent absence of Olivine.

@shawnwillsey

2 жыл бұрын

The olivine is in the basalt but crystals are too small to see in these specific flows.

Great video, just bought your book Idaho Roadside and I love it.

@shawnwillsey

2 жыл бұрын

Awesome and thanks. Yes, I have two books, Geology Underfoot in Southern Idaho and Roadside Geology of Idaho. The first is a more in-depth look at 23 different sites whereas the second is more a cursory review of the geology along Idaho's highways.

I really need to stop watching your videos lol. You just keep adding new places to my bucket list! This is definitely one of them! So cool!

@shawnwillsey

2 жыл бұрын

Lots to explore for sure. Make a list and start ticking them off!

Thanks again, love your information and education. 🌄

@shawnwillsey

Жыл бұрын

So nice of you

I love the idea of a xenolith being dragged up from deep in the crust, and what it can tell us about the source of the magma that feeds the volcano.

Thanks, very interesting and added to my experience there. 👍

@shawnwillsey

2 жыл бұрын

Good to hear. Heading back out there on Wednesday to train NPS staff.

We stayed there for a few days last year. Never seen anything like it. Thank you for this video. Very interesting.

I love these videos

@shawnwillsey

2 жыл бұрын

Hey thanks. Love to hear it. Enjoy perusing the existing videos, look for some new ones in the coming days, and be sure to subscribe and share. I appreciate it.

Cool explanation of the pumice zeolite

Great stuff. Was at Craters of the Moon 2 months ago.

Great informative video!

Good video. Nice eye work to spot those zenoliths!

GREAT" WALK-N-TALK! Cheers for YOU N YOURS" and HAPPY Thanksgiving 2022 from LEWIS County!

Ok this one straightened me out more about the eruptions at Craters of the Moon. I now see that it is a story with 2 different eruption periods and not one volcanic source but two. I had gotten them confused. I also noticed that zenoliths can be from different sources in the same area. The pumice and granolite being different. This area really has a complex geologic history. I didn't know anything about the area when I was thin the mid 1980s.

It's so recent that it's easy to imagine it looking just like it does while still molten and in motion.

Thank you - Love your educational explanations! Is this volcanic area believed to be dormant, or extinct? Why would activity have stopped? In other words, what caused this deep-source volcanic activity?

@shawnwillsey

2 жыл бұрын

Thanks for your comment and so glad you and others are enjoying these. They are fun and easy to do while I am traveling or doing field work. You asked some great questions. The volcanism at Craters of the Moon is definitely not extinct. Most geologists classify it as "active" but that doesn't mean its currently erupting but rather that it has erupted in the past few thousand years and will erupt again soon. The area will erupt again, mostly likely within the next 1,000 years. Looking at eruptive behavior over the past 15,000 years, the area has eruptive phases that last a few hundred to a few thousand years separated by quiescent periods lasting several hundred to 3,000 years. The supply of magma waxes and wanes which controls eruptive behavior along with the amount of gases dissolved in the magma which aids the buoyancy of the magma. The magma in the Snake River Plain is driven mainly by the passage of this region over the Yellowstone Hot Spot (a plume of deep magma ascending toward the surface). Magma generation may also be partially caused by the east-west extension over the past 15 million years which thins the crust and causes magma to form.

@Mistydazzle

2 жыл бұрын

@@shawnwillsey Thank you very much!

Amazing and so like Iceland I wonder if the new eruption brought up deeper rocks there… lovely comparison in my mind

It seems like much of the story of this continent has been figured out. I'd be interested in hearing some of the mysteries that still remain with North American geology, if any. Particularly with geomorphology, which I find fascinating.

❤

Was the gas in this eruption steam from groundwater, CO2, or something else? COTM is quite distant from the Juan de Fuca tectonic plate so it would seem that it is NOT seawater captured in its subduction zone. Thanks for this great series - you have personally saved me from renting an RV!

@shawnwillsey

2 жыл бұрын

Hi there. Thanks for watching and learning with me. Eruptions at COM are not subduction related, but rather some combination of residual magma left over from the passage of the Yellowstone hot spot combined with magmas generated by Basin and Range extension. The COM volcanoes in this area (around Visitor Center) show no signs of interacting with groundwater (see my videos on Kings Bowl and Split Butte at the south end of monument to see what happens when groundwater is involved).

@bagoquarks

2 жыл бұрын

@@shawnwillsey Thanks for the very prompt reply. Ruling out water of any kind, what gas candidates are left?

@shawnwillsey

2 жыл бұрын

@@bagoquarks Magmas contain dissolved gases which are key in triggering eruptions. Hot, runny magmas like basalt tend to release gases more easily, resulting in less explosive eruptions. Sticky, pasty magmas like rhyolitic magmas tend to trap gases, building pressure until a more explosive eruption ensues.

Does the word "Scoria" find it's way into what is being observed at this location???

@shawnwillsey

2 жыл бұрын

scoria is commonly used to describe highly vesiculated (gas bubbles) basalt. You could use it nearly synonymously with the cinders.

@rogercotman1314

2 жыл бұрын

@@shawnwillsey Thanks Shawn, my rock specimens of Scoria and Pahoehoe came from my 1990's visit to CMNM. Loved the visit, while there I was in Lava heaven .............

you infer this aha and pahoehoe were originally part of the same mass. was it?

@shawnwillsey

2 жыл бұрын

There is no a'a lava shown in the video but I do mention it as pahoehoe flows can transition into a'a flows as they move away from the vent, cool, and become more viscous. The transition phase is a type of lava called shelly lava. So some pahoehoe flows do become shelly pahoehoe and/or a'a lavas further from the vent. Hope this helps.