The uplift was so fast that the ancestral Snake River couldn't cut through fast enough to keep its old course and had to divert north. That's from an ancient rivers video from Nick Zentner.
There’s actually a relatively new paper that finds that the ancestral Snake actually went north into Montana and fed into the Clark Fork until about 4 mya. Then as the hotspot passed and the crust sank behind it diverted into the Boise basin, that filled the lake there and overtopped a divide to cut Hells Canyon
my ancestral western hometown.... our clan hit there in 1862. My great great grandfather is who Abel's Ridge is named for, his timber claims ran up the ridge, the homestead was down on Cummings Creek, maybe nearly a mile up from the Tucannon Rd. Sooooooo many cousins from there to Prineville! I geek out on the rocks, AND the family history.
I had a great friend who built a cabin in the Blue Mountains of Oregon near Elgin. Absolutely beautiful vistas from his house- and he had only two neighbors- the federal government’s Umatilla National Forest 4:27 and the Boise-Cascade Timber Company. The nearest house was around 12 miles from his cabin which was located on a south facing ridge. You needed a 4 wheel drive vehicle to get there but the place was incredibly beautiful. It was probably the most scenic spot that I have ever vacationed at.
When geologists began noticing that many hot spot tracks can be traced back to large basalt provinces it was thought that the Columbia basalts represented the initiation of the Yellowstone hot spot, near 17 million years ago. However, even though those flows are enormous they are dwarfed by the immense size of other large igneous provinces. The Columbia basalts probably originated through interaction between the established Yellowstone plume and the subducting Juan de Fuca and Gorda plates, descending beneath what is now Washington and Oregon. To oversimplify, the plume heated the subducting slab to produce those lava flows. There is evidence that the Yellowstone hot spot has been active more than 17 million years. While the Yellowstone plume almost certainly was the heat source which produced the Columbia basalt flows, the plume head should have produced much more basalt than those spectacular flows. There is a large oceanic basalt plateau which docked against North America around 50 million years ago, named Siletzia. It formed off the western coast of North America beginning around 55 million years ago and then accreted to the continent. Siletzia appears to be the southern portion of the basalt plateau produced by the Yellowstone plume head, and it underlies much of western Washington and Oregon. The northern portion became attached to the Pacific plate and moved north up the coast toward Alaska, where it is now accreting as the Yakutat terrane. If anyone reading this hasn't yet heard of NIck Zentner, he has been doing a series on the initiation of the Cascades volcanic arc, beginning with the Siletzia which is what those volcanoes erupted through. His TH-cam channel is well worth checking out for a wealth of mostly Washington-oriented geology.
More than 20 years ago my very intelligent daughter was about to begin her second year of college. She still had no idea what to choose as her major. I suggested geology, explaining that it was interesting because it dealt with such large events and timescales. Geology 101 filled a requirement so it was easy to start in that direction. She currently is a geophysicist with Chevron, which has paid very well. Unfortunately there a strong company indoctrination, which includes believing in human caused climate change despite that there is no real science to support it.
Wow! I have been driving that area for almost 2 decades and have been wondering about their formation. Geology is getting very detailed. I would have never thought of this complicated process. Thank you very much for this video.
So fascinating. Thank you so much for producing these videos. Really interesting content, and great choice of graphics to explain it all. Sponges cut in half? Amazing.
Hello.. Very cool. I grew up in these mountains. I just went through them on a road trip last year. Now I have the great info explaining the awesome rock formations. Beautiful. Thank you. 🎄🎄🎄
On another topic: Have you done a video on the Strait of Gibraltar? I just saw a brief but unenlightening tease on why there is no bridge or tunnel connecting the African and European continents via that strait. So: what is the geology that makes that narrow divide so deep?!
That's insane! 😮 Does anyone else think it would be cool to sit back with some popcorn and watch all of this unfold over a few hundred million years? 😊
Thank you for explaining the Blue Mountain origins. I have travelled through them many times and often wondered why they even existed not being part of the Cascades, Rockies or Basin and Range Mountains.
As I understand it, a widely supported idea now is that plume magmas were impeded by the broken-off Farallon plate remnant -- causing, I guess, massive build-up of the magma, with the magmas eventually getting through the slab, resulting in the widespread and quite voluminous basalt eruptions. The initial YHS plume head was likely the origin of the Siletzia oceanic LIP, which is _far_ more voluminous than the Columbia River basalts. Wallowa is: wuh-LAO-uh
Yeah The Columbia river flood basalts were more of pseudo flood basalts being far less in volume of material than any true flood basalt recognized. It also shows a much more complex geochemistry than the direct plume derived melts which from an igneous petrology paper , Petrogenesis of Siletzia: The world's youngest oceanic plateau 2020, Ciborowski et al Results in Geochemistry 2020, the plume has a distinct signature of enrichment in typically depleted elements and isotopes transitioning from sampling a purely oceanic mantle to more continental crustal material which given the gradual character of that transition and the distinctive chemical fingerprint of the lavas it is pretty strong evidence that Siletzia was the actual plume head. The age of Siletzia volcanics also notably gets younger to the east within the big blob of material with some Siletzia signature lavas dating to the post collisional timeframe i.e. 47 to 31 Ma with the substantial unit of the Greys river volcanics dating almost entirely between 41 and 39 Ma which shows that activity continued after colliding. Then you add in the Adakite progression between 30 and 20 Ma identified by Dr. Camp as well as the vast slab window and associated dual direction slab rollback which based on the associated shift in the subduction zone's volcanoes west and the corresponding onset of Basin and Range extension with the slab window in question being the same shape as the Basin and range province which all match up in time with the Columbia river flood basalts. So yeah that is 3 forms of data from lava petrology, seismic tomography and geomorphology/geochronology all building and supporting the same picture so really there is no excuse for holding onto the debunked younger model as the data is incompatible with that model. The chemistry of the Columbia river flood basalts is after all too complicated/chemically evolved to be a true plume head, that melt likely sat around some time also incorporating bulk depleted mantle and probably bits of the slab itself into its chemistry.
Can you cover the 7 Devil Mountains in Idaho? They are on the other side of the Snake River from the Wallowas in Oregon, and I’ve been there multiple times and it is beautiful. I’ve always wanted an explanation of how and when they formed!
The Blues are beautiful. Near Long Creek, Oregon, the Blues, the Strawberrys, and the Elkhorns converge, and there is also granite, which may have occurred when the Wallowa Mountains floated over from SE Asia, approximately 13 million years ago
The Wallowas are one of most beautiful places in all of Oregon, and relatively unknown. Definitely a place to go for amazing hiking and backpacking! The clip of Broken Top @3:54 is a little out of place though ;-)
I have a tough time believing the Wallowa Mountains and Blue Mountains are geologically the same, the two mountain ranges could not look more different.
That's what I thought, because that's what I'd read. When someone talks about the Blues it's like talking about the Coast Range--a generalized area of mountains in close proximity but of different origins.
This is so amazing.Thank you very much.I'm a human and to have this kind of knowledge about the wonders of nature.And the power of nature is just oh it's simply amazing that we can as humans talk about this wow
That reminds to get my good winter boots out as I on occasion find myself out in the middle of the Blues working in the cold. Cell reception is marginal to zero.
Wasn't there a hotspot that essentially looks like it moves East, but in fact the whole Western Plate is moving West over the hotspot, and it's now somewhere in the area of Yellowstone Park. It's like a window into the Mantle?
Hello this is my favorite TH-cam channel of all TH-cam channels. Could you do a video about katla in Iceland? It is my favorite volcano!!!! Totally okay if not though!!! :)
This region also has a lot of thundereggs. They're thought to be formed in magma chambers, but beyond that little is known about them. There's not a whole lot of great rockhounding in the PNW despite the awesome geology but thunderegg collecting in eastern Oregon is the exception. I imagine that all the rapid uplift and erosion exposed a lot of volcano innards where thundereggs existed.
Talking of erosion in this video brings me an idea. All the erosion that has happened in the mountains must be balanced by deposits downstream and eventually the ocean. But the ocean doesn't seem to have the necessary quantity of deposition at the major river mouths. Where did all the soil go?
The key detail is that material carried downstream by rivers doesn't stop when it reaches the ocean, look at the the high res maps of the seafloor around any major river system and you will find substantial debris fans spreading out onto the sea floor with deep submarine canyons and ravines which have never been exposed above sea level. These are all generated by turbidites which are the turbulent sediment laden debris flows which can reach hundreds of kilometers out onto the abyssal plains. While some of this may come from the denser part of direct discharges from sediment laden rivers much of these features are likely the result of submarine land slides but outburst floods and other events can also contribute to these flows. Not only that but as streams and turbidites carry material down to lower elevations and depths material is left along the way where it can accumulate over time this is the main way continental shelfs get built up building up the continental interiors with layers of sand stones siltstones and mudstones as well as carbonate platforms(seeded by silicates) forming at different distances from the sources. Most major sedimentary units formed in this manner before being subsequently reshaped by deposition weathering and tectonic events, there are a few that don't like dune fields or the continental portion of river floodplains and wetlands, but these are exceptions rather than the rule since Earth is mostly covered in water. A good bulk of that material which ends up on the abyssal plains will ultimately end up getting subducted and recycled into the mantle resulting in Earth's upper mantle being fairly well mixed as opposed to the more complex story of the lower mantle.
I’ve lived in Oregon for 11 years, driven East through 84 a dozen or more times - had no idea they were called the Blue Mountains. For us it’s the Wallowas (WAAL-uh-wuz) to the North and Umatillas (OO-ma-TILL-uz) to the South of the Interstate.
Hmm there was an interior basin or basins associated with the Cascadia back arc which did serve as the main zone of accumulation for the pseudo flood basalt but otherwise it should be noted that this would have been east of the cascades by and large and thus a more continental setting. As hot material accumulated below the crust that would have also caused those areas to bulge upward from the thermal expansion much as is happened or happening in Africa or the Adirondacks the only young mountain range on the east coast which appears to be a still rising uplift dome associated with mantle upwelling. From Nick's interview with Dr. Camp earlier this year there is evidence from the patterns of sediment erosion and discontinuities that this uplift dome did exist leading up to the Columbia river flood basalts. It is possible some fossils could be there there are known examples of petrified trees after all but lava unlike pyroclastic generally isn't the best at fossilizing things in a way which preserves their structure. Though the exact picture of what is going on with the Adirondacks is fairly unresolved these mountains are probably the best current analog to what the region would have been like prior to the flood basalts breaching onto the surface, there is a decent chance that the Adirondacks in several million to tens of millions of years might be the site of a new flood basalt the upwelling heat source below if interpreted to be a rising plume seems to have risen about halfway up through the upper mantle. I should emphasize though that the picture with the Columbia river flood basalts is looking to be far more complex than the simple plume head picture presented here likely having more to do with the plume breaking through the Farallon slab and causing it to fragment while simultaneously creating the Basin and Range province as the remaining sections of the slab to the east and west of the zone off failure rolled back leaving a distinctive age progression of lavas and a slab window which perfectly fits the Basin and Range Province along with a sunken broken off chunk of slab that likely used to fill that hole.
I love that you covered the Blue Mountains, as this is where I reside and study the geology. There is soooo much more to the story of the Blue Mountains than you described here. The geology is quite diverse and complicated. This is very much so an over simplification
For a short informational video for people who are not geologists, duh, it is information that would never be accessed at all. So Mr stuffed shirt I hope your comment reached the ever so small audience you intended.
Another flood basalt video, another request to do a video on a hypothetical modern day flood basalt and what things would likely happen locally and globally as time progressed. 😃
"Absurdly high.." lol used several times...930 meters, 13K feet thick. I think that deserves a local T-shirt! "Oregon, Blue Mountains, Absurdly Thick...we do Basalt!"
There’s got to be a lot radioactive heavy elements in the core. Has anyone investigated the migration of heavy metals especially radioactive ones going all the way back into the earliest geologic history of the earth? I gotta think that as they sink and get moved by convection it’s possible to get to densities where it could be sub critical at least. Perhaps, such a thing could be an explanation for some of the periods of absurdly high volcanic activity?
There is also something else about these mountains. Where they are at today is not the original location where they formed. Look up the baha-BC story. The rock types are an exact match to the rocks found up by cle-elum Washington. I am talking about the exotic terrain rocks.
It's interesting to see how the Columbia River valley by The Dalles and the blue mountains look so different when they were brought about by essentially the same lava flow event.
Nope not happening. This videos information is in error. There were no lavas from the east flowing west. There is new data that now involves breakoff plates that allowed magma to cause uplift under the Blues and allowed magma to filling the break point and lift the whole area.
These are the Blue Mountains of Oregon Trail fame. Their distance from Independence MO meant there was a good chance of wagon trains hitting the Blues at the beginning of winter and getting trapped. Lewis and Clark also traveled through the region naming the valley we live within as the Grande Ronde Valley. The movie "Paint Your Wagon" was filmed here also.
Ehhh, no.... The Blue mountains are one of the terranes that collided with the N. American Craton. Neither the geo chem, nor the Paleo magnetic data inform anyone that they are part of the various CRB flows.
The issue is how/why the uplift occurred. Tim did not state that the Blue Mountain material that is exposed had to come from the CRB, but that the multi-million year intrusion of denser basalt under the lighter upper-crust material caused the upper material to rise.
@TheDanEdwards The feeder dikes opened relating to the hotspot influence, and post the Siletzia impact breaking the plate. The rotation which is causing all upwelling here in the northwest, is in directly because of the direction of the Continental movement, and a subducting triple junction. Not because magical basalt lifted the Craton in the Blue mtns, which again; are not part of the Craton.
The uplift was so fast that the ancestral Snake River couldn't cut through fast enough to keep its old course and had to divert north.
That's from an ancient rivers video from Nick Zentner.
There’s actually a relatively new paper that finds that the ancestral Snake actually went north into Montana and fed into the Clark Fork until about 4 mya. Then as the hotspot passed and the crust sank behind it diverted into the Boise basin, that filled the lake there and overtopped a divide to cut Hells Canyon
love Nick
Hello from Summerville Oregon and the Grande Ronde Valley in the heart of the Blue Mountains.
Shout out back at ya from Dayton, Washington. 😎👍
my ancestral western hometown.... our clan hit there in 1862. My great great grandfather is who Abel's Ridge is named for, his timber claims ran up the ridge, the homestead was down on Cummings Creek, maybe nearly a mile up from the Tucannon Rd. Sooooooo many cousins from there to Prineville! I geek out on the rocks, AND the family history.
And them showing wallowa lake and calling it blue mountains.
Total disappointment
I had a great friend who built a cabin in the Blue Mountains of Oregon near Elgin. Absolutely beautiful vistas from his house- and he had only two neighbors- the federal government’s Umatilla National Forest 4:27 and the Boise-Cascade Timber Company. The nearest house was around 12 miles from his cabin which was located on a south facing ridge. You needed a 4 wheel drive vehicle to get there but the place was incredibly beautiful. It was probably the most scenic spot that I have ever vacationed at.
I live in the Grande Ronde Valley near Elgin.
Did not know this little piece of our continents history, thank you!
Always interesting, appreciate.
When geologists began noticing that many hot spot tracks can be traced back to large basalt provinces it was thought that the Columbia basalts represented the initiation of the Yellowstone hot spot, near 17 million years ago. However, even though those flows are enormous they are dwarfed by the immense size of other large igneous provinces. The Columbia basalts probably originated through interaction between the established Yellowstone plume and the subducting Juan de Fuca and Gorda plates, descending beneath what is now Washington and Oregon. To oversimplify, the plume heated the subducting slab to produce those lava flows.
There is evidence that the Yellowstone hot spot has been active more than 17 million years. While the Yellowstone plume almost certainly was the heat source which produced the Columbia basalt flows, the plume head should have produced much more basalt than those spectacular flows. There is a large oceanic basalt plateau which docked against North America around 50 million years ago, named Siletzia. It formed off the western coast of North America beginning around 55 million years ago and then accreted to the continent. Siletzia appears to be the southern portion of the basalt plateau produced by the Yellowstone plume head, and it underlies much of western Washington and Oregon. The northern portion became attached to the Pacific plate and moved north up the coast toward Alaska, where it is now accreting as the Yakutat terrane.
If anyone reading this hasn't yet heard of NIck Zentner, he has been doing a series on the initiation of the Cascades volcanic arc, beginning with the Siletzia which is what those volcanoes erupted through. His TH-cam channel is well worth checking out for a wealth of mostly Washington-oriented geology.
I was wondering how many comments I'd have to read before Ned Zinger was mentioned.
Nick is great! Always enjoy his presentations!
I love learning about absurdly large geologic situations.
More than 20 years ago my very intelligent daughter was about to begin her second year of college. She still had no idea what to choose as her major. I suggested geology, explaining that it was interesting because it dealt with such large events and timescales. Geology 101 filled a requirement so it was easy to start in that direction. She currently is a geophysicist with Chevron, which has paid very well. Unfortunately there a strong company indoctrination, which includes believing in human caused climate change despite that there is no real science to support it.
@@jonathanrichardson469there absolutely is science to support human induced climate change.
"the geology situation is crazy" - moistcr1tikal
It all a lie
Thanks for all the hard work on these videos!
Thanks as always, Geology Hub!
Driving through the NE corner or Oregon through the blue mountains is one of my favorite drives.
Another fabulously informative video
A fine and concise presentation. Thx.
No not accurate wallowa lake is NOT in the blue mountains. Zero research, total BS
Have driven through the Blue Mountains maybe 200 times. Did a Costco refrigerator food delivery through there and lumber every other day for awhile
The blue mountains are one of my favorite places here in Oregon.
Wow! I have been driving that area for almost 2 decades and have been wondering about their formation. Geology is getting very detailed. I would have never thought of this complicated process.
Thank you very much for this video.
Merry Christmas and a very Happy New Year to all....................
Ive been waiting for a video about the blues for over 2 years now from geo hub.
So fascinating. Thank you so much for producing these videos. Really interesting content, and great choice of graphics to explain it all. Sponges cut in half? Amazing.
Hello.. Very cool. I grew up in these mountains. I just went through them on a road trip last year. Now I have the great info explaining the awesome rock formations. Beautiful. Thank you. 🎄🎄🎄
Thank you Hub , great topic , them were awesome flows 👍
2:11 I love those columnar basalt flows in Eastern Oregon. They are so neat how they are often hexagonal and stacked like bee comb
Another incredibly beautiful area of Oregon.
On another topic: Have you done a video on the Strait of Gibraltar? I just saw a brief but unenlightening tease on why there is no bridge or tunnel connecting the African and European continents via that strait. So: what is the geology that makes that narrow divide so deep?!
Thank you for a great description of my backyard.
That's insane! 😮 Does anyone else think it would be cool to sit back with some popcorn and watch all of this unfold over a few hundred million years? 😊
Lava is actually quite hot
I think your popcorn would get stale.
Thank you for explaining the Blue Mountain origins. I have travelled through them many times and often wondered why they even existed not being part of the Cascades, Rockies or Basin and Range Mountains.
As I understand it, a widely supported idea now is that plume magmas were impeded by the broken-off Farallon plate remnant -- causing, I guess, massive build-up of the magma, with the magmas eventually getting through the slab, resulting in the widespread and quite voluminous basalt eruptions.
The initial YHS plume head was likely the origin of the Siletzia oceanic LIP, which is _far_ more voluminous than the Columbia River basalts.
Wallowa is: wuh-LAO-uh
Yeah The Columbia river flood basalts were more of pseudo flood basalts being far less in volume of material than any true flood basalt recognized.
It also shows a much more complex geochemistry than the direct plume derived melts which from an igneous petrology paper , Petrogenesis of Siletzia: The world's youngest oceanic plateau 2020, Ciborowski et al Results in Geochemistry 2020, the plume has a distinct signature of enrichment in typically depleted elements and isotopes transitioning from sampling a purely oceanic mantle to more continental crustal material which given the gradual character of that transition and the distinctive chemical fingerprint of the lavas it is pretty strong evidence that Siletzia was the actual plume head. The age of Siletzia volcanics also notably gets younger to the east within the big blob of material with some Siletzia signature lavas dating to the post collisional timeframe i.e. 47 to 31 Ma with the substantial unit of the Greys river volcanics dating almost entirely between 41 and 39 Ma which shows that activity continued after colliding.
Then you add in the Adakite progression between 30 and 20 Ma identified by Dr. Camp as well as the vast slab window and associated dual direction slab rollback which based on the associated shift in the subduction zone's volcanoes west and the corresponding onset of Basin and Range extension with the slab window in question being the same shape as the Basin and range province which all match up in time with the Columbia river flood basalts.
So yeah that is 3 forms of data from lava petrology, seismic tomography and geomorphology/geochronology all building and supporting the same picture so really there is no excuse for holding onto the debunked younger model as the data is incompatible with that model.
The chemistry of the Columbia river flood basalts is after all too complicated/chemically evolved to be a true plume head, that melt likely sat around some time also incorporating bulk depleted mantle and probably bits of the slab itself into its chemistry.
So fascinating!! Thank you for sharing!!
Can you cover the 7 Devil Mountains in Idaho? They are on the other side of the Snake River from the Wallowas in Oregon, and I’ve been there multiple times and it is beautiful. I’ve always wanted an explanation of how and when they formed!
These mountains are very notable when traveling from Utah/Idaho into Seattle or Portland too!
The Blues are beautiful. Near Long Creek, Oregon, the Blues, the Strawberrys, and the Elkhorns converge, and there is also granite, which may have occurred when the Wallowa Mountains floated over from SE Asia, approximately 13 million years ago
I thought the Wallowas were just the same as the rest of the Blues? I don't see how they showed up from SE Asia.
@the Wallowas are mainly granite, with some basaltic (volcanic) overlay. They are older than the Blues. You can easily find the information online
Could you cover the Supersition Mountains in Arizona?
The Wallowas are one of most beautiful places in all of Oregon, and relatively unknown. Definitely a place to go for amazing hiking and backpacking!
The clip of Broken Top @3:54 is a little out of place though ;-)
The town of Joseph and the state park there at Lake Wallowa are incredibly beautiful. It really is a hidden gem!
Got to love Oregon !
you should do a video on what would happen if a flood basalt where to happen today
I second this
My understanding is that the most recent basalt flood was just 2000 years ago at Craters of the Moon.
That was interesting. I wonder where that basalt crystal wall is located.
I have a tough time believing the Wallowa Mountains and Blue Mountains are geologically the same, the two mountain ranges could not look more different.
That's what I thought, because that's what I'd read. When someone talks about the Blues it's like talking about the Coast Range--a generalized area of mountains in close proximity but of different origins.
The Wallowas and Elkhorns are really rugged and then you go over Deadman Pass and it's basically flat. It's always confused me.
Thanks.
This is so amazing.Thank you very much.I'm a human and to have this kind of knowledge about the wonders of nature.And the power of nature is just oh it's simply amazing that we can as humans talk about this wow
You're a human? Nah we all thought you were a bot!
@@RedRoseSeptember22 some of the other comments are the most chatgpt comments ever
I have a question for you, Geologyhub, do you think verneshot eruptions are possible, or do you think it's science fiction?
Second listen, will probably need more to take it all in. Did you/he explain the name "Blue"?
I just drove though there this morning rugged and very long windy sloop’s that go for miles! I didn’t even think of the Basalt’s
That reminds to get my good winter boots out as I on occasion find myself out in the middle of the Blues working in the cold. Cell reception is marginal to zero.
Wasn't there a hotspot that essentially looks like it moves East, but in fact the whole Western Plate is moving West over the hotspot, and it's now somewhere in the area of Yellowstone Park. It's like a window into the Mantle?
Hello this is my favorite TH-cam channel of all TH-cam channels. Could you do a video about katla in Iceland? It is my favorite volcano!!!! Totally okay if not though!!! :)
Can you do a video on the Green Ridge fault and the Metolius area?
This region also has a lot of thundereggs. They're thought to be formed in magma chambers, but beyond that little is known about them. There's not a whole lot of great rockhounding in the PNW despite the awesome geology but thunderegg collecting in eastern Oregon is the exception. I imagine that all the rapid uplift and erosion exposed a lot of volcano innards where thundereggs existed.
Are their any other mountain ranges that were formed in a similar fashion? This seems a pretty unique circumstance.
I live at the base of the Elkhorn Mountains in Baker City. So where did the gold deposits come from in this aria?
Awesome 😎
Talking of erosion in this video brings me an idea. All the erosion that has happened in the mountains must be balanced by deposits downstream and eventually the ocean. But the ocean doesn't seem to have the necessary quantity of deposition at the major river mouths. Where did all the soil go?
The key detail is that material carried downstream by rivers doesn't stop when it reaches the ocean, look at the the high res maps of the seafloor around any major river system and you will find substantial debris fans spreading out onto the sea floor with deep submarine canyons and ravines which have never been exposed above sea level. These are all generated by turbidites which are the turbulent sediment laden debris flows which can reach hundreds of kilometers out onto the abyssal plains. While some of this may come from the denser part of direct discharges from sediment laden rivers much of these features are likely the result of submarine land slides but outburst floods and other events can also contribute to these flows.
Not only that but as streams and turbidites carry material down to lower elevations and depths material is left along the way where it can accumulate over time this is the main way continental shelfs get built up building up the continental interiors with layers of sand stones siltstones and mudstones as well as carbonate platforms(seeded by silicates) forming at different distances from the sources. Most major sedimentary units formed in this manner before being subsequently reshaped by deposition weathering and tectonic events, there are a few that don't like dune fields or the continental portion of river floodplains and wetlands, but these are exceptions rather than the rule since Earth is mostly covered in water.
A good bulk of that material which ends up on the abyssal plains will ultimately end up getting subducted and recycled into the mantle resulting in Earth's upper mantle being fairly well mixed as opposed to the more complex story of the lower mantle.
I just wanna say it
*nice*
I love fishing for rainbow trout in the blue mountains
thanks bro
Can you explain how Newberry Volcano is correlated to this? You didn't mention it, I'm assuming it is a different period in time.
I know nothing about geography. 😅 But I 😅find these videos fascinating 😊
I’ve lived in Oregon for 11 years, driven East through 84 a dozen or more times - had no idea they were called the Blue Mountains.
For us it’s the Wallowas (WAAL-uh-wuz) to the North and Umatillas (OO-ma-TILL-uz) to the South of the Interstate.
Oh dear God that would be the end of the Modern West Coast USA.
I drove over the blues today.
Not to be confused with the blue mountains in New South Wales Australia
Was any of this above sea level before the lava covered it all? What kind of fossils would we find if we dug down to that layer?
Hmm there was an interior basin or basins associated with the Cascadia back arc which did serve as the main zone of accumulation for the pseudo flood basalt but otherwise it should be noted that this would have been east of the cascades by and large and thus a more continental setting. As hot material accumulated below the crust that would have also caused those areas to bulge upward from the thermal expansion much as is happened or happening in Africa or the Adirondacks the only young mountain range on the east coast which appears to be a still rising uplift dome associated with mantle upwelling. From Nick's interview with Dr. Camp earlier this year there is evidence from the patterns of sediment erosion and discontinuities that this uplift dome did exist leading up to the Columbia river flood basalts.
It is possible some fossils could be there there are known examples of petrified trees after all but lava unlike pyroclastic generally isn't the best at fossilizing things in a way which preserves their structure.
Though the exact picture of what is going on with the Adirondacks is fairly unresolved these mountains are probably the best current analog to what the region would have been like prior to the flood basalts breaching onto the surface, there is a decent chance that the Adirondacks in several million to tens of millions of years might be the site of a new flood basalt the upwelling heat source below if interpreted to be a rising plume seems to have risen about halfway up through the upper mantle.
I should emphasize though that the picture with the Columbia river flood basalts is looking to be far more complex than the simple plume head picture presented here likely having more to do with the plume breaking through the Farallon slab and causing it to fragment while simultaneously creating the Basin and Range province as the remaining sections of the slab to the east and west of the zone off failure rolled back leaving a distinctive age progression of lavas and a slab window which perfectly fits the Basin and Range Province along with a sunken broken off chunk of slab that likely used to fill that hole.
I must ask: Why are the Blue Mountains so sad?
Because they get taken for granite.
I always figured it was a pressure bubble sent out from the Yucatan impact.
I love that you covered the Blue Mountains, as this is where I reside and study the geology. There is soooo much more to the story of the Blue Mountains than you described here. The geology is quite diverse and complicated. This is very much so an over simplification
For a short informational video for people who are not geologists, duh, it is information that would never be accessed at all. So Mr stuffed shirt I hope your comment reached the ever so small audience you intended.
Another flood basalt video, another request to do a video on a hypothetical modern day flood basalt and what things would likely happen locally and globally as time progressed. 😃
"Absurdly high.." lol used several times...930 meters, 13K feet thick. I think that deserves a local T-shirt! "Oregon, Blue Mountains, Absurdly Thick...we do Basalt!"
Hiked for 6 weeks thru the blues when I was 17, 21 years ago. Was not by choice. Catherine Freer wilderness therapy expeditions.
The Blue Mountains aka Ered Luin. I've heard of them before. The ancient Dwarven cities of Nogrod and Belegost used to located there.
I was wrong about when the Wallowas floated onto the North American continent, it was much longer ago than that
There’s got to be a lot radioactive heavy elements in the core. Has anyone investigated the migration of heavy metals especially radioactive ones going all the way back into the earliest geologic history of the earth?
I gotta think that as they sink and get moved by convection it’s possible to get to densities where it could be sub critical at least. Perhaps, such a thing could be an explanation for some of the periods of absurdly high volcanic activity?
There is also something else about these mountains. Where they are at today is not the original location where they formed. Look up the baha-BC story. The rock types are an exact match to the rocks found up by cle-elum Washington. I am talking about the exotic terrain rocks.
Also the large column basalts you show are part of the elephant mountain flow. It made it all the way to the Pacific Ocean. Some for the ginco flow.
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Why is it limited to this region and not to the immediate South? Thicker crust= Higher uplift?
So basically similar to how the Drakensburg formed in South Africa?
But if you put sponge on hot lava, the sponge would burn off?
It's interesting to see how the Columbia River valley by The Dalles and the blue mountains look so different when they were brought about by essentially the same lava flow event.
Nope not happening. This videos information is in error. There were no lavas from the east flowing west. There is new data that now involves breakoff plates that allowed magma to cause uplift under the Blues and allowed magma to filling the break point and lift the whole area.
Merry Christmas, or, Happy holidays if you prefer.
the serpents eye!
So does that mean the current lithospheric drip under Nevada is going to cause a mountain range to appear there over the next few million years?
I thought the Blue Ridge Mountains were in VIRGINIA like the song says?!
These are the Blue Mountains of Oregon Trail fame. Their distance from Independence MO meant there was a good chance of wagon trains hitting the Blues at the beginning of winter and getting trapped. Lewis and Clark also traveled through the region naming the valley we live within as the Grande Ronde Valley. The movie "Paint Your Wagon" was filmed here also.
@@robsimer9296 I was actually joking.
And. This happened 9 hours ago,,,,,,, AMAZING.🥵🥵🥵🥵🥵
The eastern Wallowa range is pronounced “Wuh-lao-uh”.
Reading the title one could think this all happened yesterday, you are breaking the devastating news. lol
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Also lots of gold an silver!
And so, Sasquatch came to live here! 🤣
Columbia river flood basalts
6,900 feet?
heh...nice
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Some moto riding thru Blue, Elkhorn & Wallowa Mtns
th-cam.com/video/zwgKEyq9x3Q/w-d-xo.html
WALL- LAH- WAHS
Not, Wah-low-ohz.
Ukiha Oregon place to see and fill freezer full of deer and elk meat !
First comment
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17 million - BULLSH-T-- 12,000- The Gothenburg Event
Too robotic
Take your AI and shove it.
Boring ahh Reddit video
2nd comment 1st is overrated
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Ehhh, no....
The Blue mountains are one of the terranes that collided with the N. American Craton. Neither the geo chem, nor the Paleo magnetic data inform anyone that they are part of the various CRB flows.
The issue is how/why the uplift occurred. Tim did not state that the Blue Mountain material that is exposed had to come from the CRB, but that the multi-million year intrusion of denser basalt under the lighter upper-crust material caused the upper material to rise.
@TheDanEdwards The feeder dikes opened relating to the hotspot influence, and post the Siletzia impact breaking the plate. The rotation which is causing all upwelling here in the northwest, is in directly because of the direction of the Continental movement, and a subducting triple junction. Not because magical basalt lifted the Craton in the Blue mtns, which again; are not part of the Craton.
Not first
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