I’ve had to disable comments on most of my videos due to climate deniers. The avoid facts like the plague. Hoping they avoid my geology lectures.

@@gilbertbernhardt4420 Allowing comments on politically sensitive topics such as climate change fosters open dialogue and debate, providing educational opportunities where experts, akin to the wisdom of the crowd, can clarify misconceptions and enhance public understanding. It helps build a community of engaged viewers, ensuring accountability and transparency by demonstrating a commitment to engaging with and addressing public criticism. Feedback from comments can improve content quality and prevent the formation of echo chambers by introducing diverse perspectives. Engaging with the public in the comments enhances the credibility of content creators, encouraging civic engagement and informed action. Additionally, feedback on platforms like KZbin can feed the algorithm, promoting wider dispersion of ideas. While moderation may be necessary to maintain a respectful and constructive environment, the benefits of keeping comments enabled are substantial, leading to a more informed, engaged, and active public.

There is substantial evidence from geophysical, geochemical, and geological studies indicating that mantle convection cells can remain active and continue to influence surface tectonics for millions to tens of millions of years after being overridden by continental lithosphere. This evidence supports the idea that mantle dynamics play a crucial role in driving continental rifting and extension in regions such as the East African Rift, Baja California, the Rio Grande Rift, and the Basin and Range Province. References: 1. Seismic Imaging: “Seismic evidence for plume-like upwelling beneath the East African Rift.” Nature Geoscience, 2013. 2. Geochemistry: “Mantle plume signatures in Ethiopian volcanic rocks.” Geochemistry, Geophysics, Geosystems, 2014. 3. Geophysical Observations: “Heat flow and lithospheric thinning in the East African Rift.” Journal of Geophysical Research: Solid Earth, 2012. 4. Seismic Activity: “Seismicity and tectonics of the Gulf of California rift zone.” Journal of Geophysical Research: Solid Earth, 2016. 5. Geophysical Data: “Mantle upwelling beneath Baja California: Insights from geophysical observations.” Geophysical Research Letters, 2015. 6. Seismic and Tomographic Data: “Mantle structure beneath the Rio Grande Rift: Insights from seismic tomography.” Geophysical Journal International, 2011. 7. Volcanism and Heat Flow: “Heat flow and volcanic activity in the Rio Grande Rift.” Journal of Volcanology and Geothermal Research, 2013. 8. Geophysical Imaging: “Mantle dynamics beneath the Basin and Range Province.” Earth and Planetary Science Letters, 2010. 9. Geodetic Data: “Crustal extension in the Basin and Range Province from GPS measurements.” Journal of Geophysical Research: Solid Earth, 2014.

Thank you! Glad it was helpful, that’s the reason why I do them!

That is so cool John!

Thank you.

I am sorry you feel that way. I am not a native Oregonian nor am I from the Basin and Range province. I do mispronounce locality names; but I strive to make sure the science is correct and try to teach it in an understandable format. GNIS contains records for approximately one million geographic names in the United States, including populated places, lakes, streams, summits, valleys, and ridges. It is difficult to regionally pronounce the name of every single one.

Thank you, Frank, for your comment. I had not realized that. I guess it is magical. There was so much background I felt that was necessary to set the table, so to speak, that it took a while to get to the subject of blueschists. Maybe I should do a more concise, 5-minute, video on the subject.

It was a general statement based a physiographic map by Orr and Orr. Thank you for the correction.

Thank you, Matthew, for your suggestion. This video is based on a 5 minute radio program I have on KYAQ 91.7 fm and KYAQ.org. There just isn’t enough time to cover all the information. I have other videos which cover in more detail explaining atomic bonding and it’s relationship to mineral characteristics.

Thanks☺️

Thank you. I will investigate that.

Thank you so much, Gilberto. My given name is Gilbert, too.

Thank you, Mark.

I had Abert in my notes but I had thought I had made a mistake and said Albert. Thanks for the humorous😀 correction.

I also have to think about dropping the L every time I say Abert

@@gilbertbernhardt4420 I once heard that it's the nearest refuge for myself in Chan Thomas's innundation theory. Wherein it was compared to a section of the south coast of Australia today.

@@tuzonthume George Strait already proposed and rebuked the hypothesis in his song Ocean Front Property.

You are welcome. I plan to visit the province later this year, possibly at spring break.

Thank you, Mark, for watching.

Thank you very much for your comments!

@@gilbertbernhardt4420 heck yeah!

Thank you for viewing!

Thank you very much!

Indeed, no blueschist without it!

Thank you very much!

I have often thought I would go out on Yaquina head and watch it roll in. Thank you for the kind words.

Thanks, I am glad you enjoyed the lecture!

My pleasure

Unfortunately, that is not one of my specialties. If I get a chance, I will research and let you know.

I’ve heard it pronounced many different ways over the years. I’ve been a geo-scientist for 50 years. Always room to learn something new. When I started it was pronounced the way I pronounced it. Today, apparently, it is pronounced by some, the way you pronounce it. Thanks for sharing..

What a lovely, kind, and encouraging message! Thank you so much for viewing and appreciating the videos.

Thank you so much, Zuni! I hope you enjoy your trip and that my videos are helpful.

Thank you for viewing and commenting.

Very close in appearance, formed under same conditions but with slightly lower temperature and pressure. You know you are on a descending plate.

I am very glad you were able utilize the information because I had a lot of fun gathering the information.

Thanks for sharing, Mark. I am glad you found the video useful.

Thank you, Mark, for the compliment. I am glad the videos are useful.

@@gilbertbernhardt4420 I just found your videos, so I plan on watching all of them thoroughly this winter, in preperation for a lot of prospecting in 22'...very exciting!

@@southernoregonprospector9074 thank you. I hope you find them informative.

Thank you, Mark. It’s an incredible history and the story continues!

Thank you very much!

Thank you, Richard.

Thank you!

Thanks, Richard.

Thank you for the comment. I’m glad you gave it a watch and responded.

Hope to get down there some day.

Thank you!

Thanks for letting me know!

Thanks, I did not know that! I’ll check it out the next time I am down that way.

@@gilbertbernhardt4420 www.mindat.org/loc-231994.html

Thank you, Valorie!

very cool!

Excellent question. As you know the hot spot is stationary and the North American plate moves westward about 1 “ per year.

@@gilbertbernhardt4420 Thank you for answering! :) Do you think there will be an eruption when it reaches a thin area in the crust? Because if we know the rate of movement and previous eruptions crust thickness, can't we predict the next eruption? Or is there more to it?

There is an eruption every couple of million years. It’s been about 2.1 million years since the last one. Not sure when the next one will occur. Let’s hope for at least a thousand years!

Thank you very much!

I appreciate you giving this video a view!

Thank you, Joel. I love Nick's videos, as well. Very little research has been done on Siletzia and it is the integral last chapter of exotic lands attaching to North America.

Thank you Joel. I enjoy Nick's videos as well. There has not been a lot of research on Siletzia. So I have tried to consolidate what I have found into something that is coherent and un derstandable.

I found a site about 8 miles north of Mitchel, Oregon on Oregon 207 (the Service Creek - Mitchell Hwy). The outcrop was in a draw leading to Service Creek. Found another site serpentinite off of us 395 north of Mt. Vernon, Oregon.

@@gilbertbernhardt4420 I am a geology student in Utah. May I please buy a sample from you?

@@gilbertbernhardt4420 Can I buy a sample from you. I'm just looking for something about the size of a half-dollar coin: a little over two inches. And I want something that shows good properties of the rock.

@@wandawilliams8287 i have blue schist

Thank you very much!

1. The literature shows that temperatures remained almost constant from the rift zone in southeastern Washington., 2. It was mostly tholeiitic basalt which has a high melting temperature and very fluid. and 3. Volume of material erupted.