TY for this presentation... I just passed half a century of being here on Earth, and have been studying geology ever since I took a few geo classes way back in the 90s. What I NEVER knew up until now, after watching this, is that CA used to be a volcanic island arc. That's wild! Also, I grew up in IB, and saw those Coronados nearly every day, with the most striking one aptly named "Mummy island" for it's shape from that northern perspective. Now I now how they formed, and aren't just really big rocks.
As a SoCal native I really enjoyed this. Where can I see the rest of your lecture! I saw the next slide was going to cover the Santiago Peak Volcanics!
yes, around minute 35, I do have a question, it seems you're saying the Sierra Nevada and the Coastal/Baja Range are volcanic, but I think of volcanic as being dark-ish basalt-ish, not being white-ish granite-ish, so I'm very confused. I did like hearing about volcanic cores turning into plutons and batholiths, but am confused about their composition as compared to the stuff that did make it to the surface. When I look around in the Owens Valley east of the Sierra I see lots of ancient volcanoes and volcanic flows that are visually very distinct, reds and dark browns, from the white-ish granite of the Sierra. If a volcano can have a granitic core what does the eruption of such a volcano look like ?
Wonderful presentation! Should have thousands of views. Good visuals, good explanations, clear explanations.
TY for this presentation... I just passed half a century of being here on Earth, and have been studying geology ever since I took a few geo classes way back in the 90s. What I NEVER knew up until now, after watching this, is that CA used to be a volcanic island arc. That's wild! Also, I grew up in IB, and saw those Coronados nearly every day, with the most striking one aptly named "Mummy island" for it's shape from that northern perspective. Now I now how they formed, and aren't just really big rocks.
As a SoCal native I really enjoyed this. Where can I see the rest of your lecture! I saw the next slide was going to cover the Santiago Peak Volcanics!
This is the entirety of the presentation!
Wonderful presentation! Your instruction is very clear. Thank you very much.
Absolutely wonderful presentation.Thank you so much.Your enthusiasm is infectious and left me with a thousand more questions.
Thank you for posting this lecture. I learned a lot!
yes, around minute 35, I do have a question, it seems you're saying the Sierra Nevada and the Coastal/Baja Range are volcanic, but I think of volcanic as being dark-ish basalt-ish, not being white-ish granite-ish, so I'm very confused. I did like hearing about volcanic cores turning into plutons and batholiths, but am confused about their composition as compared to the stuff that did make it to the surface. When I look around in the Owens Valley east of the Sierra I see lots of ancient volcanoes and volcanic flows that are visually very distinct, reds and dark browns, from the white-ish granite of the Sierra. If a volcano can have a granitic core what does the eruption of such a volcano look like ?
I'm in rancho Cucamonga California
Not far from Mt. BALDY
Your 🔥
🙂
Great work
Hope you the best
some of those islands smacked into Mexico and/or moved north towards Washington/BC
The oceans are also referred to as "basins"... just need to point that out lol
Salton butte volcanoes are a couple thousand years old.not a couple hundred.
Til 100mya wasn't it reverse polarity subduction, off west coast?...