The Mystery Mounds at Mount Shasta; A Landslide that Traveled 30 Miles

[@GeologyHub]

Mount Shasta is one of the most spectacular geologic features in California. Just like Mount Adams, it has been unusually quiet for the last several hundred years. EDIT: looks like I made a mistake in this video. Forgot that Mount Whitney is taller than Shasta. Meant to say tallest volcano in the state not tallest point in the state

[@dralord1307]

I know its a little outside your normal videos but could you explain the different ways clay is naturally produced. I have been unable to find this after years of searching for a good explanation.

[@AFMR0420]

I was trying to find some evidence cited somewhere but I can’t. I could take a picture but can’t post it here. But as far as I can tell from visual inspection, as well as what I heard on the radio, all of Mt Shasta’s glaciers melted this summer, and it is ice and snow free for the first time in recorded history, and according to some local natives, possibly the first time since it’s formation.

[@AtarahDerek]

I always get Witney and Shasta mixed up, so no worries. Although I thought they were both volcanoes.

[@adriennefloreen]

Wow, I was looking at the satellite video of Shasta on my iPhone and they updated the satellite image, if you zoom in on it you can see it with almost all the snow melted as people in the comments are saying it is right now, and you can see the mountain structure and scars from other landslides and it's really cool.

[@Dranzerk8908]

Have you ever seen sat images of around Mammoth Cave? You can see potholes all over the surface of collapse of groundwater into the cave system.. It literally looks like a battlefield of bombs going off in a area. Pretty cool feature.

[@jerryburg6564]

Mt Shasta is not the highest point in California. The highest is Mt Whitney @ 14505’. At 14157‘ Mt Shasta is the fifth highest peak in the state. However it’s the only peak in the top ten that isn’t in the Sierra. Shasta is part of the Cascade Range that runs from Washington state through Oregon into Northern California.

[@GeologyHub]

This is correct. I meant to say tallest volcano in the state, not tallest peak. I made a mistake.

[@bychristopherewing]

@@GeologyHub it’s ok, you give great information, thank you.

[@testbenchdude]

@@GeologyHub Kinda hilarious that your brain did that. Like, all of the other, higher peaks aren't volcanoes, so they don't count. Just teasing you GH :)

[@ReflectionTool637]

Not a big deal, but just to set the record straight, the Cascades go north into BC from WA.

[@AtarahDerek]

@@ReflectionTool637 The Cascades are defined as the mountain range formed by the subduction of the Juan de Fuca plate beneath the North American plate. Thus all volcanoes and mountains from the coast of northern California to British Colombia are part of the Cascades.

[@slipknot7424]

On the other side of Mt Shasta by Medicine Lake when this happened was miles wide lava flows that created mountain sized hills made of pure obsidian surrounded by white sand, you can walk through lava tunnels that stretch from Mt Shasta to Mount Lassen.

[@lemmdus2119]

That has to be wild looking

[@stevenbrooks1243]

Didn't know that tunnels from the mtns existed cool

[@barbaraarledge448]

@@lemmdus2119 p

[@slipknot7424]

@@stevenbrooks1243 there’s a 1000 yard tunnel just past the Susanville exit off of 44 which is really cool. The Medicine Lake area has quite a few tunnels everywhere. If you go to the top of the mountain where all the hang gliders go about a mile up the hill after you take the Susanville exit you’ll see how these lava flows traveled, it’s pretty cool and scary if you think about it.

[@sir_cornholio5]

I have climbed Mount Shasta 35 times and summited about 20. And I've still never gone to this area. I would really love to go unfortunately I moved to New York last year. Need to come back immediately to get my climbs in. I miss you Shasta!!

[@vernowen2083]

I instantly knew what you were going to say! I'm a survivor of Mt. Saint Helens. Lost my house and all my belongings to the third mudflow, which ripped the house from its foundation. Sheriff came that morning and told me to get out, minutes before the first wave of water and logs came through. Then the first lahar came through and filled the riverbed. The second filled my basement and if you watch some of the old footage, you'll see my house being swept under the old highway 99 bridge.

[@DaniTheDeer]

Everyone is talking about the mistake, but nobody is talking about how fun it is to say hummocky

[@GentlyUsedOreos]

Being in and around that area; I always wondered about that section of land along the I-5 of those exact mounds you're discussing. Nice to have a suspicion confirmed. ❤️ Love your content as always!!! ❤️

[@samuelb6960]

Mt shasta 14,179 Mt Whitney 14,505

[@condrumnumberone9456]

Isn't Mount Whitney in California? ;)

[@ben4life988]

Yes

[@intrigueproductions5344]

Is she gonna sing like Whitney?

[@steveegbert7429]

Yup, tallest in the lower 48 states, 348 ft taller. Doesn't sound like much but try telling yourself that while gasping for air at 14,000 ft.

[@ptl87]

question: ok so a landslide caused the creation of the mounds -- got it -- but how exactly does a landslide translate into mounds? is it just a huge layer and then erosion creates them? how? love your channel, thx!

[@matthewstorer8236]

I have the same question. Maybe the landslide was followed by a lateral blast and then lahars? Only explanation I can think of. Much like St.Helens in 80'.

[@ComfyTV]

Im guessing that varied compositions of rock were present in the landslide (perhaps due to thermal influence or simply because the LS was so large) and after being randomly deposited some eroded less than others

[@chriswren1825]

Mounds=chunks of mountain that kept shape as it slid out in more viscous muck. Imagine milk curds in whey.

[@andrewpugh9322]

Mt Whitney is the tallest peak in Ca Homie🤷🏼‍♂️

[@Elena14204]

i have a request.. could you do videos covering all of Lassen Volcanic National Park's features?

[@adriennefloreen]

Wow. I used to drive to the area shown at 3 minutes in to this video (the area that stretches from Weed to Yreka) to pick a certain type of sage that grows in that rocky and sandy volcanic dirt in that exact area you drew out in red. There's lots of cool plants in that area and they are different from the plants in the surrounding area.

[@AdamTrautmanBowling]

I live about 70 miles for Shasta. Pretty Awesome volcano.

[@geosophik9369]

When it comes to California, people think of earthquakes and they forget about the volcanoes, which is funny. I mean, the Lassen volcano erupted several times between 1914 and 1917, which is like an hour ago in geological terms. The state is full of volcanic activity, past and present, from the tip south in the Salton Sea to the tip north in Lava Beds National Monument.

[@GamerChick5567]

Lava beds and lassen are so cool. Been there!

[@patrickjones8255]

Literally the only time I've heard anyone pronounce Shasta like that.

[@Dvpainter]

I like that on the satellite view you used earlier on in the video that you could see previous slides on the terrain coming out of the mountain on multiple angles, definitely gives a visual aid to the uncommonness of this one

[@moestuph8817]

Mima (and other similar) mounds might make an interesting topic, though they're a bit smaller scale than your usual stuff. If i recall correctly, their cause hasn't been proven.

[@grandmakellymcdonald]

Too cool! 💕🌺❤️👵

[@djjamar]

Mount Whitney is the tallest in California and the tallest in the entire continental United States 🇺🇸

[@DennisCaffey]

In my epoch (sometimes) travels from the Northwest to So. Cal I've always stopped at the lookout off I-5 (southbound) to view Mt. Shasta (what a beauty) and those mounds have always made me curious. Thanks for posting this information.

[@Strikepig335]

New topic please: Ridgecrest, CA and its 2019 earthquakes and its proximity to the Coso Volcanic Field 20 miles to the north as well as its proximity the Garlock and San Andreas Faults to the south. Curious about the region and if the events and formations are tied together geologically. Thanks.

[@paulharrison3631]

I think the whole thing is called Walker Lane….that’s where scientists think that some of the stress from the San Andreas might be getting transferred to.

[@chuckhursch5374]

@@paulharrison3631 I think Walker Lane is further up north in western Nevada

[@paulharrison3631]

The Walker Lane is a diffuse zone of normal and strike-slip faults. It follows an approximately 60-mile (100-kilometer)-wide swath along the Eastern Sierras and California/Nevada border, reaching from Death Valley and the Garlock Fault in the south to north of the Honey Lake Valley region.

[@williamevans6522]

That Ridgecrest field sure is still rippin along. No activity south of Garlock fault.

[@Dragrath1]

The San Andreas and Garlock faults (and the larger Walker Lane region they are part of) in terms of their bigger picture both serve as plate boundaries for the Sierra Nevada microplate a more rigid buoyant region of crust compared to the surrounding crust that displays a diverse mix of primarily transverse and or extensional plate boundaries as it it is getting sheered and rotated between the relative motion of both the North American and Pacific plates and has thus become largely disconnected from the larger North American plate along its Western Eastern and Southern boundaries. These plate weaknesses allow magmatic intrusions to rise into the crust and trigger volcanic activity while also eroding away at the crust from below via lithospheric thinning. In essence the Sierra Nevada microplate is a block of crust which is being sheered off of North America much like has happened with the Baja Peninsula and the rest of the land west of the San Andreas only it is able to better hold together as it is primarily supported by a large lower density predominately granodiorite batholith which is rigid enough to hold together in a way the surrounding accreted crust can't do. At this point it's largely independent with only the Northern boundary really still somewhat connected. Some other volcanic features linked to the plate boundaries of this microplate are the Long Valley Caldera -Mono-Inyo volcanic chain as well as Salton buttes and a number of other volcanic fields but it is indeed most well known for its powerful transform fault boundaries.

[@MrMakulit1959]

could this be the story behind the chocolate hills in Bohol?

[@tristanguitton5610]

Would you be able to cover the reason that people thought there was a volcano hidden in the Florida swamps. Know as the wakulla volcano

[@than217]

Cryogenic Hummock was my favorite hair metal band back in the day...

[@woodchuck306]

Geologist Paul Dawson and his geologist friends were flying back from Mt. St. Helens to Weed airport in 1980 and realized at that moment they were looking at one of the largest long-run-out landslide on our planet. Dawson was a geology teacher at College of the Siskiyous in Weed.

[@Nemodog]

I cannot wrap my brain a around landslide traveling that far! I've lived in Alaska where avalanches are not uncommon and I've seen what they can do, but this is off the chart! Amazing.

[@matthewstorer8236]

I agree! A 27 mile long landslide? Seems like the work of fiction. Maybe a landslide with an enormous lateral blast maybe. Just a landslide is hard for me to believe.

[@FirewindII]

Visit the Grand Canyon and sit on the rim and ponder that stratigraphy

[@JasonWorks-rf1yt]

I live next to the old peak of Mount Rainier 35'ish miles from the rest of the mountain. Cascadian mud flows are no joke. Like land locked tsunami's waiting to happen. Happy Shakey shakey splashy splashy 🎉

[@tracynation2820]

An excellent video, and you answered every question, but I think I missed the part where I learn how an avalanche can make mounds like that. 💙 T.E.N.

[@jamesgarman8601]

Do you know about the Mina mounds in Washington State? Are they from volcano collapses? Or some other geologic occurrence?

[@ytmndman]

I thought Mount Whitney the tallest point in CA.

[@goldenbuglab]

최근 인도네시아 보루네오 섬에서 발생한 지진이 일어났을 때 산이 먼 거리를 움직였다는 뉴스를 들었습니다. 혹시 이에 대해서 알 수 있을까요?

[@jmaraf7741]

Those mounds look very similar to the mystery mounds in the Philippines...

[@Diggit7979]

Not the tallest unless it's had a recent growth spurt. That should be Mt. Whitney?

[@FirewindII]

Each claims a different prize.

[@thatperson6471]

Mud volcanos please

[@jasonstinson1767]

What do you think of the idea of gemstones of every state? Most famous, valued, rarity ect. Or just the varied geology of each state. I'm in Ky for example and we have eastern ky mountains mainly comprised of shale where coal seems are found then the bluegrass region with limestone karst topography responsible for the calcium that grows race horses, provides distilleries water and forms cave country. Further west is the knobs are in which I live with shale formations and fossil beds such as falls of the Ohio. I would greatly enjoy knowing this about other states. I really appreciate your content and see various pathways of growth.

[@MyKharli]

Do we know the actual process these hillocks form ? i imagine a large boulder is a seed but no idea really .

[@roychristianson3644]

Please share what is known about the tiny Butte mountain range and volcano.

[@sumtimes6022]

May I ask you to consider covering the Pisgah cinder cone, located in the Mojave desert (located in SoCal off I-40 | Route 66). There is also lava tunes and other volcanic features throughout the surrounding desert. I lnow live in the area and have been traveling this area since childhood. I have basic knowledge, but would love to know more! I appreciate your videos! Thank you!

[@GeologyHub]

I have a video on it! It is part of the Lavic Lake volcanic field. m.kzbin.info/www/bejne/nYK3fHeEaa92q9E

[@timmccarthy872]

@@GeologyHub I'm having a difficult time imagining you pronouncing an exclamation mark

[@sumtimes6022]

@@GeologyHub THANKS!!! I will share with my peeps!!!!!! ❤🧡💛💚🤎🌵🏜 Thank you for making me more knowledgeable!

[@TB86000]

Geology Hub - Currently the World Track & Field Championships are being held in Eugene, OR. It appears to me that the hilly areas just east of Eugene, visible on tv from Hayward Field, looks to my novice eyes like the hummocky landscape you described in this video. Could these hillocks be from Mt Mazama (Crater Lake) or another massive eruption or am I off the mark with this guess?

[@terryhale9006]

Would like to know the dynamics of how the mounds form. Are they directionally shaped?

[@marks1638]

Besides the larger hills or mounds as you drive through the landscape along Route 97 from Oregon to the I-5, these are hundreds of what looks like boulders scattered all over the landscape. I always thought they were lava bombs from earlier eruptions, but your explanation may be closer to their origins.

[@ProjectHazy]

You should mount Taylor and the Valle caldera in New Mexico

[@muhammadnursyahmi9440]

Would you be covering the colossal landslide that give birth to Heart Mountain?

[@thefeatheredfrontiersman8135]

How were the ruby mountains of Elko Nevada formed? What is that white shiny stone up there? I'd love to see that video!

[@l-gj4464]

Check out this video about the same type of landforms on Iceland: kzbin.info/www/bejne/Z2nLmqacn7BlhJo

[@FirewindII]

Thank you. I was wondering where the phenomenon is replicated around the world to make the hypothesis more robust.

[@beedumpling3820]

It's actually pronounced Mt. Shast-uh, not Shost-uh. Love this channel btw! :)

[@darrellid]

Yeah, that made this particular video difficult to listen to. Just weird. Some of these presenters would benefit from studying up a bit more. Overall, great content, of course.

[@stihlnz]

New Zealand has a volcanic cone Mt Taranaki / Egmont, that has similar small humps on its western ring plane edge near Warea. The photo @ 3:15 is very similar to them.

[@richjdnz]

Came here to say this, too. Worth checking out on Google Maps.

[@Sunny_Now_and_Then]

Is anything going on with Katla in Iceland?? Just curious.

[@Eric_Hutton.1980]

I thought Mount Whitney was the tallest point in California.

[@jop4649]

Probably one question to take from this, is this: Is Mount Shasta at risk of a landslide, similar to what happened in the past, today? I feel that this 14,000 foot-tall volcano is going to surprise us in the future.

[@chuckhursch5374]

It certainly towers over Mt Shasta City below. I might be a little worried about a slide off the west side of the mountain, tho haven’t heard any discussion that it is at risk

[@Ohmylanta686]

No

[@ShummaAwilum]

Would love to see a video on the Tuscaloosa Seamount.

[@ShummaAwilum]

Nevermind, forgot about this video: kzbin.info/www/bejne/oaipmWeKgMZ1kLM

[@maxpower19711]

I always thought those were lava domes, but this explanation makes a lot more sense.

[@javierclement3047]

I usually like your videos, but I disliked this video and unsubscribed because of the use of “CE” (as opposed to AD), an artificially concocted and bigoted expression meant to literally erase history and pretend it’s not delineated the way it is because of Christianity.

[@chrismess135]

I just subscribed to counter the above foolishness.

[@FirewindII]

Point of Information: Is this a science discussion or a religion discussion?

[@jeffd4380]

Agreed and I'm not a religious person. I'm still watching though.

[@javierclement3047]

@@chrismess135 verifiably incorrect. I am able to see your subscribe and unsubscribe date through the API And you’ve been subscribed for months. Bye.

[@chrismess135]

@@javierclement3047 HaHa good one. You're just making more stuff up.

[@SactownOwen]

I am curious about the history of the Colima volcano in Jalisco, Mexico. I read that it has had similar collapse in its history.

[@patricknorton5788]

Great video. My family and I recently drove down through the area just NW of Mount Shasta and I was on the lookout for the debris avalanche hummocks, but was unable to recognize the terrain around us as belonged to that event. The tall conical hills around us (and on a relatively flat base elevation) were so large that I assumed that they were cinder cones. I had not read up on the subject recently enough to realize what we were seeing. I knew that this was something to look for but the scale was overwhelming. I have visited the mounds near Mount St. Helens in preparation for assisting with a class on the subject that my wife (who works for the USGS) but I haven't read those articles for years. Despite this I would have to take exception to your assertion that one should see a field of similar landforms near a volcano that one should assume it is due to a titanic landslide. Many, if not most, large volcanoes (either stratovolcanoes or of the sheild type, are surrounded by a field of parasitic cones or cinder cones, or volcanic plugs (including one near MountShasta). These sometimes do not even have central craters, and resemble in general form the hummocks of the much rarer volcanic sector collapses. From a worm's eye view (i.e., driving along the highway) these volcanic edifices are indistinguishable.

[@steveegbert7429]

I remember wondering about these any time I would drive by Shasta. Then, after my first visit to Mt. St. Helens after the 1980 eruption, and then driving through the Mt. Shasta area again, it clicked... OK, now I know what those are!

[@SpaceLover-he9fj]

This has to be one of the largest debris avalanches from a stratovolcano that we know of! Others are Raung, Meru and more.

[@plathanosthegrape5569]

Cover the Iztaccihuatl volcano then ...

[@Froblyx]

Everybody I know pronounces it with a flat 'a', as in "as", not a short 'o' as in this video. Also, the transition from avalanche with flat surface to hummocks is not explained.

[@pirobot668beta]

There are other 'mound complexes' that cannot be explained by flow alone. They can be seen as 'vibration artifacts', like putting dust on a vibrating plate and watching it form patterns. The West coast is a geological 'hot-spot' of faults and subduction zones; a low-level, long-duration quake could shake the ground enough to produce mound patterns. Some mound-systems have very regular spacing and size...'shaker-quakes' could be the cause.

[@Sailor376also]

Landslides can also take place in coastal terrain. There is evidence that there have been several or many large landslides associated with the Hawaiian Islands. The Halina Slump is likely a beginning of one.. And there are tsunami features in Australia that are also associated with a prehistoric landslide of the Hawaiian Islands. The evidence in Australia implies the tsunami wave reached a height of as much as 100 meters after traveling that distance across the Pacific. If Google Maps can be believed,, the maps show evidence of slides stretching for hundreds of miles away from Hawaii/

[@FirewindII]

Doesn't the Oregon coast exhibit similar evidence? Not sure it was the same occurrence.

[@Sailor376also]

@@FirewindII Different occurrence. Two possible answers that I know of to address.. Are there evidences of slides from Oregon stretching out into the Pacific,, that, I don't know. As to evidence of tsunamis coming onshore,, Yes, there have been many covering several thousands of years. It is a semi regular occurrence. There is a subduction zone offshore of Oregon and Washington coasts(northern Cal to southern BC) It catches and then releases. The releases, earthquakes, cause large tsunamis. The last of these was 9PM January 26th, 1700. Tree ring data coupled with Japanese written records, and native American oral history, place it very precisely. These releases occur something between 300 to 500 years. I would suggest, by the interest shown by your question,, Wiki has a good concise article. Atwater first noted something odd or interesting,, the rest of the story has unfolded. Fascinating study and scientific detective work. Enjoy. en.wikipedia.org/wiki/Cascadia_subduction_zone

[@FirewindII]

@@Sailor376also "...Fascinating study and scientific detective work. Enjoy..." Indeed.

[@clintonsmith9931]

In Texas we call them prairie dog mounds . You see we have large prairie dogs in Texas. In the 1930s depression our prairie dogs may have had kinfolks go to California with the people that went hunting jobs.

[@mrrockguy9311]

Similar deposits came of interest after the 1980 eruption of Mt. St. Helens associated with many ancestral Cascade Arc eruptions. My M.S. thesis is focused on massive volcanic-debris deposits west and southwest of Lake Tahoe where ancient paleovalleys were filled with these debris-avalanches (The Barker Pass debris-avalanche deposits). I believe some hummocky terrain has been observed at some of the furthest extent of some these deposits, but are not the direct focus of my research.

[@buttersstotch6752]

Okay i know this is a little thing but at least pronounce Shasta correctly. It doesn't rhyme with pasta. That's just cringeworthy, like Napa pronounced like Papa, the long a is a ridiculously tacky affectation of locals trying to sound cultured. Likewise avocados are not aaahvocaaahdos, dammit hermione.

[@The.Subtilizer]

Mt shasta's acne

[@zacharymoran7596]

So along Highway 530 in Washington state there is the town of Oso, which was the site of a large landslide a few years ago. Destroyed most of the town and killed a bunch of people in the night. I remember the first time I drove up that way, and I saw these mounds. I wasn’t aware that I was driving past Oso, but when I saw the mounds my first thought was “wait, as those hummocks?” Then I saw the scar in the hillside and realized where I was….

[@AndisweatherCenter]

Mount Shasta is the tallest volcano in California, but not the tallest peak. The tallest peak is mount Whitney which stands at 14,505 feet and is located near death Valley.

[@StanRaufzeil]

Maybe a few good topics for you, will be the Ruinaulta, Geologic Arena Sardona, or the collapse of a mountain at Goldau or Bondo Switzerland.

[@ComfyTV]

I would love to hear your explanation of the 2021 Uttarakhand glacial outburst flood in India

[@chriswren1825]

Cryogenic earth hummocks - please do your take on mima mounds in wash state at some point. I suspect those have more to do with water/ice dynamics at terminus of Puget lobe, but no one’s cracked it so far. Love your vids!!!!

[@Handsomegenious]

Mount Shasta is actually the 5th highest point in California behind Mount Whitney (which is the highest), but nice informative video otherwise.

[@thedawneffect]

Fascinating!

[@marcusgomez934]

You should do a video on Morro rock in Morro Bay California which is to be a volcanic plug, which killed off an existing volcano that use to be there, I guess there’s quite a bit of them south of Morro Bay too down hwy 1

[@kellyscott6361]

This answered some questions I’ve had since I vacationed at Lake Shasta while living in the SF Bay area. Thank you again for another great video ❤

[@natashagarrison9403]

Correction: Mount Whitney is the tallest point in the state. Both would be beautiful places to visit but unfortunately they lay smack dab in the middle of a liberal hell hole known as the I-5 corridor.

[@ReeveProductions]

Having driven through that area I had noticed that the land is weirdly flat for being so hilly, but honestly I was so obsessed with checking out beautiful mt. Shasta and black butte that it didn’t cross my mind for more than a minute.

[@keithb7981]

FYI Mount Shasta is not the tallest point in, Mount Whitney is the tallest point in California and in the continental United States, its current peak elevation is considered to be 14,505 ft elevation

[@rong1924]

I'm a CA native and I've never heard it pronounced "Shawsta." Kinda driving me crazy.

[@gaius_enceladus]

Mt Egmont (Taranaki) in NZ also has a really good example of that hummocky terrain.

[@tonydagostino6158]

The mounds are very similar in appearance to glacial landforms known as kames (mounds) and eskers (sinuous mounds).

[@christophereadgbe2976]

Very timely video! I saw it the day before we drove through the area. I always thought those were cinder cones. Dad knowledge may be like dad jokes, but I still pointed them out to the others in the car.

[@johnnydeez1]

In this video you clam Mt. Shasta is the highest point in California. I watch a lot of your videos and know you are intelligent but I must correct you, it is Mount Whitney that stands the tallest.

[@SinnerChrono]

Cover anything in Colorado. Thanks. If i have 2 ill spend part of my school loans in the fall to join your patreon and throw money at you till you cover things like the great sand dunes and garden of the gods.

[@deantheot7296]

what's the difference between "Hummocks and Mima Mounds?

[@onealjones9039]

The Klamath Knot and Marble Mountains geology is very very interesting.

[@kiwidonkeyk1656]

But what is the mechanism that forms the mounds? Why doesn't material just cover everything in its' path in a more even way?

[@phdtobe]

Mt Shasta is cool! Shasta Cola is apparently made from snowmelt from its sides. 😉

[@dugfriendly]

Mt Shasta is visible from Prescott Park in Medford, OR.

[@FirewindII]

What about the mounds, all in a row, in San Luis Obispo, California?

[@Pavlovsobaka]

Would you cover how the hills of Plovdiv were formed? People say they are volcanic remnants but they seem too short to me.

[@PaulMLombardi]

I grew up in the town of Mount Shasta. In school, they told us that the mounds were from a pyroclastic flow. I saw a presentation by a geologist at College of the Siskiyous who said he was the person who figured out where the mounds came from.

[@woodchuck306]

Geologist Paul Dawson was that teacher from COS.

[@johnwilliams4100]

wow people are stupid you can go into lava tubes just outside of weed lava tubes are 50 feet wide these are like bubbles of the lava flow duh?

[@scotchsoda3165]

Just drove by Shasta, all the glaciers are gone. One or two small ones on the North face.

[@bobbuilds4622]

great video thank you!🌋

[@blessedheavyelements8544]

Outstanding! Thank you and Best Regards and Best Wishes!

[@DianeKovacs]

They look like paw prints from high above. ;)

[@photonjones5908]

Actually, several peaks in California are taller than Mt. Shasta.

[@Anthony1116]

Mount Shasta is not the tallest mountain in the state of California. It is Mount Whitney. Just an FYI.

[@eviemoody]

I climbed Black Butte few years ago and was in absolute awe at the indescribable scale and beauty of the area surrounding Shasta.

[@Stubby0266]

What caused the buttes along Interstate 5 between Salem and Eugene Oregon?

[@daubinks]

Trinity alps glaciation please, or northern california exotic terranes.