This was fantastic. So many features I see in and around me at Lassen Volcanic National are resonant. The Eastern Sierra is "Disneyland" for a geologist. Than you for posting this.
What a solid educational presentation! Your lectures are a wonderful gift that tell these geologic stories with remarkable clarity in words, concepts, and graphics.
I keep coming back to this video! I wanna go on the field trip!! : ) I've been visiting this area all my life and it's so nice to get an understanding of the geology behind all the places I visit. It's kind of like being able to put a face to the name, if you know what I mean.
Thank you for this class video. Your explanations filled in a lot ofthe blanks I have in understanding the geology of the Mammoth region. It is such a beautiful part of California, now I see the bigger picture as to how that came to be. Maybe fishing lakes Crowley and Convict is in my near future. lol
I can’t say that I understand this video. But then I don’t understand the bond market either. Thanks for the idea that something broke in 2007. Will study.
Before the eruption over 700,000 years ago, was there previously a mountain in the location where the caldera now lies, which was dessimated by the eruption? Thought I read that somewhere.
25:16 arent those the White Mountains??? I remember my professor said it said to part of the Sierra Nevada mountains at some point before it was split.
Could Long Valley also have something to do with the Walker Lane? Maybe you have magmas from the higher rate of extension, with the Walker Lane providing conduits.
Not connected to the Walker lane, but related to it by one fault. Walker Lane doesn't run through the Owens Valley, but veers East, North of Mono Lake through to Death Valley until it end at the West to East Garlock Fault Zone. There is a geologic paper on why the Long Valley Caldera was formed and the Walker Lane fault system was not the cause as much as just being pulled into the Eastern Sierra shear zone. Keep in mind that many present day fault lines didn't exist before the VEI 8 eruption 760,000 ya. The area of what came to be known as the LVC was twisted around causing the weakened crust suitable for a large magma chamber to form. The following is a quote from a paper dealing with it. It is a bit complicated, but it goes into the history rather well. I provided a link at the bottom if you're more interested. "The tectonic interaction between the Eastern California Shear Zone and the Walker Lane system localizes volcanism at transtensional pull-apart sections in the Mono-Long Valley region. Long Valley Caldera is located at the western end of the Mina Deflection, a broad zone of northeast-trending left-lateral faults that form a right jog in the regional right-lateral fault system of the Owens Valley providing a link to the Walker Lane to the northeast (Figure 3)" cgec.ucdavis.edu/wp-content/uploads/final-trip-guide-2011.pdf Here is a link to the Walker Lane Map of it and a summary of its history. I also want to warn folks of articles that warn that droughts may cause the Caldera to erupt for the rankest most bogus pseudoscientific tripe I've seen because they have to make Climate Change more alarming. So there are peer reviewed papers claiming drought causes super eruptions. Don't pay attention to them. www.researchgate.net/figure/Regional-tectonic-setting-of-Long-Valley-caldera-CA-NV-The-caldera-occurs-in-a-region_fig5_26644825
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This was fantastic. So many features I see in and around me at Lassen Volcanic National are resonant. The Eastern Sierra is "Disneyland" for a geologist. Than you for posting this.
What a solid educational presentation! Your lectures are a wonderful gift that tell these geologic stories with remarkable clarity in words, concepts, and graphics.
I keep coming back to this video! I wanna go on the field trip!! : ) I've been visiting this area all my life and it's so nice to get an understanding of the geology behind all the places I visit. It's kind of like being able to put a face to the name, if you know what I mean.
Great lecture! I envy your students
This was amazing. Answered so many questions. Was just on Lookout Mountain last week looking at all the domes.
Thank you for this class video. Your explanations filled in a lot ofthe blanks I have in understanding the geology of the Mammoth region. It is such a beautiful part of California, now I see the bigger picture as to how that came to be. Maybe fishing lakes Crowley and Convict is in my near future. lol
Thanks! Great info!
I can’t say that I understand this video. But then I don’t understand the bond market either. Thanks for the idea that something broke in 2007. Will study.
Before the eruption over 700,000 years ago, was there previously a mountain in the location where the caldera now lies, which was dessimated by the eruption?
Thought I read that somewhere.
25:16 arent those the White Mountains??? I remember my professor said it said to part of the Sierra Nevada mountains at some point before it was split.
Could Long Valley also have something to do with the Walker Lane? Maybe you have magmas from the higher rate of extension, with the Walker Lane providing conduits.
Not connected to the Walker lane, but related to it by one fault. Walker Lane doesn't run through the Owens Valley, but veers East, North of Mono Lake through to Death Valley until it end at the West to East Garlock Fault Zone.
There is a geologic paper on why the Long Valley Caldera was formed and the Walker Lane fault system was not the cause as much as just being pulled into the Eastern Sierra shear zone. Keep in mind that many present day fault lines didn't exist before the VEI 8 eruption 760,000 ya. The area of what came to be known as the LVC was twisted around causing the weakened crust suitable for a large magma chamber to form. The following is a quote from a paper dealing with it. It is a bit complicated, but it goes into the history rather well. I provided a link at the bottom if you're more interested.
"The tectonic interaction between the Eastern California Shear Zone and the Walker Lane
system localizes volcanism at transtensional pull-apart sections in the Mono-Long Valley
region. Long Valley Caldera is located at the western end of the Mina Deflection, a
broad zone of northeast-trending left-lateral faults that form a right jog in the regional
right-lateral fault system of the Owens Valley providing a link to the Walker Lane to the
northeast (Figure 3)"
cgec.ucdavis.edu/wp-content/uploads/final-trip-guide-2011.pdf
Here is a link to the Walker Lane Map of it and a summary of its history. I also want to warn folks of articles that warn that droughts may cause the Caldera to erupt for the rankest most bogus pseudoscientific tripe I've seen because they have to make Climate Change more alarming. So there are peer reviewed papers claiming drought causes super eruptions. Don't pay attention to them.
www.researchgate.net/figure/Regional-tectonic-setting-of-Long-Valley-caldera-CA-NV-The-caldera-occurs-in-a-region_fig5_26644825
Great video I grew up in mammoth lakes. Only thing I need to add it’s pronounced mo-no lake not mon-o lake.
I have so many questions...😁 great video.
Any luck finding lost cement gold mine near deadman creek?
My geology professor said it erupted around 760,000 years ago… does it really matter in geologic time scale?
Moe-No Lake. Named after the Mono Indians.
When you talked about the "resurgent dome" Lookout Mountain would be a part of that correct?
Yes, Look Out Mtn. resurgent dome.