I imagine Jeff will be a major factor to the future of the science! His passion and skills are obvious! What a skilled communicator too! Thank you, Jeff, and of course Nick! I can see a lifelong friendship here!
It is so wonderful to essentially bare witness in real time to the insights and epiphanies of geologists like Jeff Tepper and Jamie MacDonald. Thank you Nick for your efforts to showcase their work and distill intricate information so that so many people can feel awe for the Cascades. And thank you to Jeff, Jamie and Erin for their fantastic sci comm skills and time. Gotta say this feels a Dream Team.
Boy, am I glad there wasn't another geologist at the gym! This video is pure gold. So much in here, I need to watch this a couple more times b4 tomorrow.
Thank you both. Jeff is taking on a 10- year project to answer a very complex jigsaw puzzle. Thank you, Jeff that is a thirst for knowledge like no other!
Gainesville VA here 43. Clear. Could a colored Geochemical topo map of the exposed magmas be useful. I.e.; similar colors by Geochemical affinity rather than geologic age?
i wish i would have found geology 45 years ago. i never knew just how interesting it really is especially out there on the west coast with plates sliding and colliding around the pacific ring of fire. i must thank you gentlemen for bringing it to life in a manner common folk like me can understand. keep up the excellent work!
This is definitely going into instant replay - so much to learn and think about! Thanks as always Nick for making us a part of this geological journey and thanks Jeff for allowing us a peek into your evolving thought process. Great episode!
This comment is not directly about this video. I just wanted the creator (Nick) to know that his personality and teaching style are awesome! That even I, a systems engineer, who has never studied geology find his story telling of our states geological history fascinating. Thank you Sir and keep up the great work.
This has been a great interview. I keep saying the same thing, but each interview helps me clarify the whole picture. Reminding us that the subducting plate is different along its length and that the crust too has different characteristics and thickness, brought a lot into focus. That and that Seletzia having subducted and broke of the plate created the thicker mantle which created a different arc signature. Maybe I understood?
My gosh the geo chemistry of volcanos/plutons is a study in and of itself. Jeff's explaination of if/then "flow chart" is fascinating! And I'm not sure 10 years is long enough but it should add significantly!!
Kinda off topic but In a couple of episodes back, didn’t Jeff mention that some of the same type of lava in Yellowstone was found in parts of the Cascades? Thanks 🙏🏼
Mr. Jeff and Ned: It's really coming together. 3d chess ish. Clear and loud. Thank you for the tenacity and interest in interesting us. Well done and see you tomorrow if I'm not late or something 😂🎉😂🎉
Jeff, if you are reading this, with respect to your realization of melting of upwelling, "unflushed" asthenosphere, would you agree that would only constitute part of the wedge, and that the upper most part of the wedge would still be rich in Ba? thank you!
After an oceanic slab subducts, there is a gap between the falling subducting plate and the crust above it. The wedge is the stuff in that gap... hot mantle that has scootched around the plate somewhere and is then subject to the fluids and the dissolvable minerals coming from the subducted plate and rises up as magma and potentially lava flows.
@@cooperjdcox49 Yes, any magma/lava/volcano that comes up from subduction. As I understand it, the subducted plate gets heated and squeezed, and the liquids and soluables leach into the wedge. The water in the rock makes it melt at a lower temperature, and being lighter than the pure mantle stuff, it rises. When it hits the surface, it erupts as a volcano. What comes out of the volcano is the mantle material from the wedge, as well as the crust material that gets melted as the magma passes though the crust.
Some day I would love hearing what has been discovered about Mt St Helens explosion in 1980. What volcanic material was produced and by what event that looks like the history of the arch.
Great! Love geochemistry! I think your comment about Barium is probably referring to Beryllium. I worked as a machinist when I was working on my geology degree, and machined Beryllium which is very toxic. Had to wear a full face mask, and other protective items when machining it.
When Nick mentions "Barium poisoning," he conceivably could be misremembering "Beryllium poisoning" (as you suggest), which is a real concern for those working with Be. Jeff then immediately responds regarding "Barium imaging," which correctly refers to a type of imaging used to diagnose GI tract issues. The rest of the time, both are clearly referring to Barium/Niobium ratios.
I imagine Jeff will be a major factor to the future of the science! His passion and skills are obvious! What a skilled communicator too! Thank you, Jeff, and of course Nick! I can see a lifelong friendship here!
It is so wonderful to essentially bare witness in real time to the insights and epiphanies of geologists like Jeff Tepper and Jamie MacDonald. Thank you Nick for your efforts to showcase their work and distill intricate information so that so many people can feel awe for the Cascades. And thank you to Jeff, Jamie and Erin for their fantastic sci comm skills and time. Gotta say this feels a Dream Team.
Love the way Jeff explains about geochemical signatures between the wedge and the hot mantel...😃💞💛Thank you!!
Boy, am I glad there wasn't another geologist at the gym! This video is pure gold. So much in here, I need to watch this a couple more times b4 tomorrow.
Same. Watching for 3rd time lol
Thank you both. Jeff is taking on a 10- year project to answer a very complex jigsaw puzzle. Thank you, Jeff that is a thirst for knowledge like no other!
Another superb contribution, Dr. Tepper. Thanks as always.
Gainesville VA here 43. Clear. Could a colored Geochemical topo map of the exposed magmas be useful. I.e.; similar colors by Geochemical affinity rather than geologic age?
This is a great idea. I know I would find it very handy.
i wish i would have found geology 45 years ago. i never knew just how interesting it really is
especially out there on the west coast with plates sliding and colliding around the pacific ring of fire.
i must thank you gentlemen for bringing it to life in a manner common folk like me can understand.
keep up the excellent work!
This is definitely going into instant replay - so much to learn and think about! Thanks as always Nick for making us a part of this geological journey and thanks Jeff for allowing us a peek into your evolving thought process. Great episode!
Very informative, great details. Above all, made easy to understand. Thank you, gentlemen.
Jeff is such a blessing! Respect. Thank you
Another interesting and awesome talk!! Thank you Jeff and Nick!!’
Loving this!
This is always awesome to think❤
This comment is not directly about this video. I just wanted the creator (Nick) to know that his personality and teaching style are awesome! That even I, a systems engineer, who has never studied geology find his story telling of our states geological history fascinating. Thank you Sir and keep up the great work.
Definitely going to watch again! Very meaty information, a lot to digest. Thanks to both of you for your time!
Thank you both ❤, excellent discussion.
Thanks for all the hard work on these videos!
This has been a great interview. I keep saying the same thing, but each interview helps me clarify the whole picture. Reminding us that the subducting plate is different along its length and that the crust too has different characteristics and thickness, brought a lot into focus. That and that Seletzia having subducted and broke of the plate created the thicker mantle which created a different arc signature. Maybe I understood?
Surprised me again with a great episode. Thanks
My gosh the geo chemistry of volcanos/plutons is a study in and of itself. Jeff's explaination of if/then "flow chart" is fascinating! And I'm not sure 10 years is long enough but it should add significantly!!
Dr. Tepper's gym thoughts > my gym thoughts 😞
Very good! Thank you, Nick and Jeff.
Cool..thankyou both.
Thank Jeff
Looking forward to Saturday.
59 in Chandler AZ. Thank you Nick.
Denver, Colorado here. It’s 42! Just before the Polar Vortex hits for four days!
People in Wallingford want to know what the Barry to Manilow ratio is. #almostlive
Oh you guys! too much fun!
Look forward to this..❤ 34:18
Kinda off topic but In a couple of episodes back, didn’t Jeff mention that some of the same type of lava in Yellowstone was found in parts of the Cascades?
Thanks 🙏🏼
Mr. Jeff and Ned:
It's really coming together. 3d chess ish.
Clear and loud.
Thank you for the tenacity and interest in interesting us. Well done and see you tomorrow if I'm not late or something 😂🎉😂🎉
"IT'S OK....IT'S OK...ITS THE NORM" 👍
Jeff, if you are reading this, with respect to your realization of melting of upwelling, "unflushed" asthenosphere, would you agree that would only constitute part of the wedge, and that the upper most part of the wedge would still be rich in Ba? thank you!
Barium is used for GI studies (mostly).
Was it the wedge?
After an oceanic slab subducts, there is a gap between the falling subducting plate and the crust above it. The wedge is the stuff in that gap... hot mantle that has scootched around the plate somewhere and is then subject to the fluids and the dissolvable minerals coming from the subducted plate and rises up as magma and potentially lava flows.
@ Does that apply to St Helens
@ I like comparing today with 46 Ma years ago.
@@cooperjdcox49 Yes, any magma/lava/volcano that comes up from subduction. As I understand it, the subducted plate gets heated and squeezed, and the liquids and soluables leach into the wedge. The water in the rock makes it melt at a lower temperature, and being lighter than the pure mantle stuff, it rises. When it hits the surface, it erupts as a volcano. What comes out of the volcano is the mantle material from the wedge, as well as the crust material that gets melted as the magma passes though the crust.
@ So today is all about subduction for the cascades.
Some day I would love hearing what has been discovered about Mt St Helens explosion in 1980. What volcanic material was produced and by what event that looks like the history of the arch.
Hello from Orlando. It's 67 degrees here
Great! Love geochemistry!
I think your comment about Barium is probably referring to Beryllium. I worked as a machinist when I was working on my geology degree, and machined Beryllium which is very toxic. Had to wear a full face mask, and other protective items when machining it.
When Nick mentions "Barium poisoning," he conceivably could be misremembering "Beryllium poisoning" (as you suggest), which is a real concern for those working with Be. Jeff then immediately responds regarding "Barium imaging," which correctly refers to a type of imaging used to diagnose GI tract issues. The rest of the time, both are clearly referring to Barium/Niobium ratios.
@ you laid it out much better than I did. Thanks for all the clarification👍
❤❤
The Cascade Arc stands out because it's BADR than most. Ok, I'll get my coat.
😎
21:38
Vancouver BC 0°
Thanks Jeff and Nick! Ya gotta luv Geochem.🧪