Love hearing about the Volcanoes and Caldaras in California. I have a Lava Bomb from one of the ancient eruptions. My Dad found it, when he dug 10ft in the ground of this parents property when he was a teenager.

The Cup & Saucer field caught me by surprise as the famous wine town of Napa is right in the midst of it. The picture of the rolling green hill and clouds used for the Windows XP desktop was taken 9.7 miles south-west of the Cup & Saucer marker shown, on Route 12 at the south end of the Sonoma Valley and a few miles up the Sonoma Valley are some red volcanic soils that look like they could be from Hawaii. There is a ton of obsidian around Mt. St. Helena (pronounced locally more like Heleeena with an emphasized long E) as well as a petrified forest with the geysers of Calistoga next door. Fascinating geology there.

@sunspot42

Жыл бұрын

Yup. It's the volcanic soil that makes the Napa and Sonoma valleys such a rich winegrowing region - all those minerals in the ground.

@MARILYNANDERSON88

Жыл бұрын

I thought I would collect obsidian from an obsidian cliff nearby. I saw blood on the ground. Then I was astounded- it was my own blood, I had brushed my arm against the obsidian rock cliff face and was deeply cut!

Long Valley is what got me interested in geology around 15 years ago. We owned a condo and cabin in Mammoth Lakes, and while I was aware of volcanic activity in the area I didn't understand enough about it to know that we were sitting inside a 20-mile wide caldera whose explosion gave Yellowstone a run for its money. Realizing that Long Valley, Mammoth Mountain, and the Inyo craters are still active, I really started studying geology much more closely and I've gotten quite a lesson on the seismology, volcanism, and geomorphology of the entire West Coast, and Washington in particular, since I live between Mt St Helens and the Cascadia subduction zone. Fact is I'm sitting ON the Boring Volcanic Field which has a recent active history. I happen to also be sitting within the Portland Basin, which is a pull-apart basin that helped form the West Hills fault and the Boring Volcanic Field. If that's not enough, my property sits in an area where the Missoula Floods completely submerged it under hundreds of feet of water and the boulders, cobbles and gravels that came with it. I sit at the foot of a 6-mile long pendant bar that was formed by the Missoula floods behind Prune Hill - another cinder cone within the Boring Volcanic Field. I don't have to worry much about Ice Age floods; might have _some_ concern with either St Helens or Mt Hood erupting in my lifetime but not likely; my biggest concern is the Cascadia Subduction Zone and the massive earthquake it's capable of generating in my area and in fact all along the West coast. Chances are around 30% right now that the margin will let go within the next 50 years, and God willing I'll still be alive for at least half that period of time.

@Peter_S_

Жыл бұрын

Look up Nick Zentner from Central Washington University if you want lots of videos about Pacific Northwest geology.

@lindaparker8297

Жыл бұрын

Move man !! I have a heartattack that's to much

@briane173

Жыл бұрын

@@Peter_S_ Been watching him for 10 years. I finally got to meet him in Ellensburg when I attended one of his downtown lectures in March. The guy is fabulous at what he does and how he does it. He's got a following that spans the globe at this point. His gift for teaching AND outreach has put his discipline and his university on the map, and I'm lucky to be in the same state where I can go to a bunch of the places he's taught about.

@Peter_S_

Жыл бұрын

@@briane173 Excellent, I figured you would know of him at least when you brought up the Missoula Floods. I left a longer and most more informative message about Nick twice (so others could join too) but the filter deleted both after about a minute. Still trying to determine the word which set it off. As much as I'm not an eLawn mush fan, I am looking forward to live Nick from the Field geology with his starlink.

@briane173

Жыл бұрын

@@Peter_S_ Try "Ned Zinger." 😂

Curious how you know an eruption lasted for six days, such a long time ago. An explanation for nonspecialists would be an excellent topic for a future video.

Would love to see a video about the ancient volcanology of Missouri. I believe there are three extinct volcanoes, but I could be wrong.

I find it remarkable the magnitude of these volcanic events. When you look at the shear magnitude of energy associated with these events it's rather humbling.

So two calderas are within easy driving distance for me and I didn't know about them before this video. I see Mt. St. Helena on clear days as I drive up 101 and it surprises me that it has a caldera. The Cup & Saucer calderas I knew nothing about. Now I'll have to see how they are accessed. The chain of volcanos explains why Napa Valley is basically straight. Another hot spring area is northwest, up Highway 12, of Sonoma. Aqua Caliente, Boyes Hot Springs, and more are the towns thet have these.

Always stoked to see a new geology hub video😊

I live in the SF Bay Area and I did not know about the Cup and Saucer calderas. I know there was other volcanism, like the Sonoma Volcanics and the now long extinct Round Top in Berkeley.

Thanks for that video. Due east of the Little Walker Caldera, just across the line into Nevada, there is a complex of volcanic peaks and lava flows that includes Aurora Crater. A few years ago there was an earthquake swarm in that area and I never heard any mention of volcanic potential there even though there is an abundance of very visible features in the area. Can you do a video on that area?

You’re the best!!! Thanks for covering the Sonoma volcanics!

I'd love for you to cover the ancient Nine Sisters volcanic plugs on the Central Coast.

I never knew there was 6 in California, I only heard there was 2, thank you for the more information

@briane173

Жыл бұрын

Yeah a couple of those mentioned are pretty obscure. I knew about Clear Lake, Medicine Lake and Long Valley; the other three I've never heard mentioned.

Thank you for posting this video

In Europe there are the Carpathian Moutains, they might not look like much but the are a few calderas some as big as 10 km

Keep me updated on them there volcanoes you hear. Thank you very much friend

What i would be interested in, is how the amount of Tephra, gases etc is calculated?

Wow, never heard of the cup and saucer field. That's not far from me. Might have to go up there and look around.

Would love to see a video on the la garita caldera in Colorado. Site of quite the volcanic eruption in the past aswell as many beautiful formations in the area due to the massive ignimbrite flareup there

I would love to see a video on clear lake

Thanks for this, as I was not aware of many of the calderas featured in this video. I was only aware of the Medicine Lake and the Long Valley calderas and the buried Rockland caldera. Also thanks for clarifying the reasons why you did not include the Rockland caldera. As we all know, it was buried by Mount Tehama, which has been eroded!

Fun fact from a USGS Geologist: Mt. St. Helena is not actually a volcano, but instead it's the result of uplift within a caldera which predates the modern mountain by roughly one million years.

Every time you said "Mt Saint Helena" I was expecting "Mt Saint Helens."

@elizabethwarman9028

Жыл бұрын

I pounce Mt. St Helens.

I want to know more about the ring you can see in Oregon that’s about 23 miles wide on Google Earth.

@briane173

Жыл бұрын

If you're talking about the circular area south of Newberry Volcano, geologists have looked at it and have concluded that it is a completely unremarkable land mass that has no volcanism or tectonic forces associated with it. There isn't even an appreciable elevation change diametrically.

What is the difference between Tephra and Ejecta?

How do these interact with the JDF/Farallon plates and the San Andreas fault. They all seem to be within the time window required for all to be operating in conjunction.

@elizabethwarman9028

Жыл бұрын

I read in a Geology paper on Google that there is talk that Faults talk to each other. So, what are they talking about right now ? Shiny Happy People?

I wonder if there is any geothermal activity at Medicine lake

Could you please provide me your source for the Mt St Helena Caldera? I'm having a hard time locating anything.

@Peter_S_

Жыл бұрын

Look for the Sonoma volcanic field first, and then within that look for the Mt. St. Helena volcanic center. I was surprised to learn of the caldera there, and that the mountain is within it. Once you dig deeper still, you find the present mountain is not a volcano at all, but the result of uplift over the last 1-2 million years while the caldera is more like 3 million years old.

LOL I thought why you're not talking about Rockland but then you snuck it in as a pre-credit scene.

This is a repeat topic from quite some time ago. I don't mean to be rude or negative, but I would rather hear about new discoveries and mote about thermal active areas around the world that relate to volcanic activities. I have requested this many times.

From the SF bay area and I've never heard of the cup & saucer volcanic field. Searching is not turning up anything about it. Do you have links to more info about it?

@Peter_S_

Жыл бұрын

Same. Also from there and Cup & Saucer was news to me even though I've been to the Robert Sibley Volcanic Regional Preserve in the Oakland/Berkeley Hills many times.

@Peter_S_

Жыл бұрын

Turns out it's actually the Cup and Saucer Volcanic Center rather than field, and it's one of 5 major volcanic centers in the Sonoma Volcanic Field which includes from north to south the Mount St. Helena, Calistoga Domes, Wildlake, Stags Leap, and Cup and Saucer centers.

@LadyAnuB

Жыл бұрын

@@Peter_S_ So I have a better reason to check out the Napa Valley than the wineries. So the Sonoma Volcanic Field volcanos in Sonoma County are considered minor?

@Peter_S_

Жыл бұрын

@@LadyAnuB The highest point in Sonoma County I believe is Mt. St. Helena and Calistoga has been a center of attention as long as people have been in the area so I wouldn't exactly call it minor, but it happened a long, long time ago so the signs are a bit harder to discern. There areas of lesser activity like Sugarloaf Ridge which are still obviously from ancient volcanism, but before this video I didn't know of any volcanic centers between about Sugarloaf Ridge and the Sibley Volcanic Preserve in the hills above Oakland/Berkeley.

Please put measurements in metric for us in the rest of the world.We do not understand your antiquated system.

@elizabethwarman9028

Жыл бұрын

Children today are only being taught metric. I Diamond paint, and the canvas sizes are in both Metric and Imperial. I can work in Metric or Imperial, but I have to clue how to translate one to the other.

Is the Long Valley Caldera related to a hot spot? As the progression mentioned makes me think it is like the Yellow Stone Hot Spot.

@briane173

Жыл бұрын

Most geologists have ruled out a hot spot, but it's geomorphology is so unusual for the place it's located they haven't been able to formulate a definitive theory for how it came to be. It sorta intersects with the north end of the graben between the Sierra Nevada and White/Inyo Mountains and probably right above the Owens Valley fault, which would be a fruitful source of all the magma that built up underneath Long Valley; but there's nothing in the geomorphology or chronology that points to a hotspot. However the crust in that area is VERY thin, so I don't imagine it would take much magma buildup to promote volcanism in the area. the Coso Volcanic Field, the Inyo Craters, and the large cinder cones west of Big Pine attest to that.

@TheDanEdwards

Жыл бұрын

Definitely not the Yellowstone hotspot, as Long Valley is too far out of the path of the movement of NA across that hotspot.

@hobsondrake

Жыл бұрын

@@briane173 Thank you.

@hobsondrake

Жыл бұрын

@@TheDanEdwards Yes I know it is not YSH.

Can a extinct volcano come back from extinction?

@RoseNZieg

Жыл бұрын

I imagine if new magma intrude into the old chambers, it's possible.

@icollectstories5702

Жыл бұрын

"Extinct" just means it hasn't erupted in a long time and isn't expected to erupt again. Surprise is not forbidden.

@ElonMuckX

Жыл бұрын

Zombie Volcano!!!

Mono Lake doesn't qualify? Not big enough?

@andrewdias478

Жыл бұрын

Mono Lake isn't a volcanic caldera. It's just a lake that happens to have a volcano in it. The same is true for Clear Lake.

How can people live so close?

Hi❤

*The word "Helena"* in the name "Mt. St. Helena" is actually pronounced thusly: *"hel - EE - nuh"* *_NOT_** the way "the announcer fellow" said it!*

@Peter_S_

Жыл бұрын

No need to have a cow. Just say monolingual caucasian locals mispronounce and butcher it into Hel-EE-na and people who know how to speak Spanish tend towards the proper Spanish pronunciation of Hel-EH-na.

@Backroad_Junkie

Жыл бұрын

And, you're wrong. We pronounce the word hel-eh-na. Look up "how to pronounce Helena"...

@TheDanEdwards

Жыл бұрын

Bwha, someone things there is an "actually pronounced" _English_ sound for a Spanish name.

@nooneherebutuschickens5201

Жыл бұрын

Helena is also an English name. Look at actress Helena Bonham-Carter.

@Peter_S_

Жыл бұрын

@@nooneherebutuschickens5201 Here it's actually a Russian name, Princess Helena de Gagarin. The Spanish and Russian pronunciations are essentially the same.

mount saimt helena..

Mt. Saint Helens is in Washington state, not California.

cup and saucer volcanic field is too quaint of a name.

Pronounced Heleena Love your channel

@Peter_S_

Жыл бұрын

All depending on how you want to butcher it. Hel-EH-na is actually correct. It's the Russian version of Helen, so there's really zero question. Princess Helena de Gagarin was the wife of the commander of Ft. Ross.

Alright! How in the heck do you know that the Long Valley Caldera eruption lasted 6 days? No form of dating technology is that accurate on an event that occurred approximately 760,000 years ago.

@briane173

Жыл бұрын

I think they might be presuming how long it took to erupt 600 sq km of tephra from a complex that size. I think the exact duration of the eruption may never be definitively determined because it wasn't just one eruption -- there were smaller eruptions along the ring faults before the center of the complex blew its top, and then about 2/3 of that material dropped right back into the collapsed caldera. So the total time taken I would imagine might've been a little longer than six days since it was a succession of separate eruptions and not just one huge one.

California has a lot of most things simply because it is so large. But it only has two Senators, the same as Rhode Island.

@zeitgeistx5239

Жыл бұрын

Until you realize America is not a democracy. Wyoming gets 3 times the electoral votes per person as California. And Congressional apportionment is unequal with 2 states with the same population having completely different number of house reps.

@elizabethwarman9028

Жыл бұрын

@@zeitgeistx5239 we are a Republic. My Government instructor said if America was a true Democracy people would be running around naked.

@Peter_S_

Жыл бұрын

@@zeitgeistx5239 America is a constitutionally limited representative democratic republic, which is a type of democracy.

@seaneendelong8065

Жыл бұрын

Which, zeitgeist, is a good thing- and us Big State Big Population peeps like CA TX and NY should recognize just that: Representation in national decision making and equalization of the levers of Power is critical for a true people's republic. Otherwise a singular large population State (or even one singular Metro zone in one State) could impose it's will onto an entire nation's peoples. Imagine if Los Angeles County set the entire legal and governance and taxing and funding agenda for the entire US..... Because it WOULD, and with NYC Metro aiding and abetting the result is that even if every other citizen hated the votes and wanted nothing to do with them using just population to determine the weight of representatives votes the ruling of our nation would make it an unsurmountable Power. And I don't know about YOU, but here in N CA we are pretty salty about the outsized Power the SoCal group has in Sac... Think about it....

@GeologyHub - Have you read the articles claiming that because humans have extracted ground water, the earth has begun to tilt out of its normal axis? Of course, the articles were full of "experts agree" and "scientists claim" without ever naming who they are. I am absolutely skeptical of the claim, but I would be interested in knowing your educated opinion. Thanks!

@briane173

Жыл бұрын

When journalists start quoting "experts" and scientists "claiming" things, it's time to be more than skeptical. I'd love to hear them tell us which way the axis has shifted; if they're going to be true to the current narrative the north pole would be shifting closer to the sun; because if it was more away from the sun we'd be discussing the impending Ice Age.

@The-Real-Blissful-Ignorance

Жыл бұрын

@@briane173 I should have written 'totally reject' instead of absolutely skeptical... Sometimes I'm just too nice for my own good.

3:35 That looks like the outline of a fetus lol.

Mt. St. Helena is pronounced as He-LEE-na, not HEL-eh-na

@Peter_S_

Жыл бұрын

It's russian for Helen. Hel-EH-na. Practice. Princess Helena de Gagarin, wife of the commander of Ft. Ross is who the mountain was renamed after. The real name of the mountain is Kanamota from the Wappo language. You probably 'correct' people who try to say San Rafael correctly.

@Qossuth

Жыл бұрын

To my knowledge this is how the island in the Atlantic is pronounced as well.

@optodata

Жыл бұрын

@@Peter_S_ That's how the local population pronounces it. My grandparents moved to the mountain in the 1940s and everyone I've heard say the name who lives anywhere near it pronounces it the way I wrote. San Rafael, Los Gatos and Los Angeles aren't pronounced the way Spanish people would say them and I don't correct anyone about that

@GeologyHub MT St Helens is in Washington not California

@andrewdias478

Жыл бұрын

He's talking about a different, extinct volcano called "Mount Saint Helena" which just happens to have a similar name to Mount Saint Helens in WA.

@Peter_S_

Жыл бұрын

Maps are your friend. You could just reference the map of California in the video.

You actually missed a caldera, it is lake tahoe

Sounds like the robo-narrator accidentally got put into evangelist mode.

ain't nothing that old

Love the info but can you talk normally..it would make it far more informative..

How do you manage to pretend to know anything about Geology if you can't even get the name of "Mt. St. Helens" correct? It's only the most important eruption in the last 100 years in the mainland US.

@briane173

Жыл бұрын

If you're hard of hearing, that's your problem.

@Peter_S_

Жыл бұрын

Did you bother to read the title, 'The Vast Volcanic Calderas in California; Mount Saint Helena, Long Valley & More!'? When the map showed Mt. St. Helena in California, did you stop and think you might have the wrong volcano in the wrong state? Did you know Mt. St. Helens is in Washington, not California?

@sigisoltau6073

Жыл бұрын

Mt St Helens is in Washington state in the Pacific Northwest. I'm not American yet I know that. Before you say someone doesn't know geology, how about you know your locations first.

@seaneendelong8065

Жыл бұрын

Or...... you could apologize 💁

@briane173

Жыл бұрын

@@sigisoltau6073 This has gotta be a common troll. Now -- if GeologyHub had pronounced it Mt. Hel-EE-nah, as it is commonly referred to by locals in CA, perhaps there would've been less confustion; but he was talking about calderas in CALIFORNIA, not Washington. That shoulda been Mr. Troll's first clue.