Columbia River Basalt Group - Related to Cascade Volcanoes?
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- čas přidán 8. 06. 2013
- Massive lava flows covered much of the inland Northwest 17-6 million years ago. The Ice Age Floods "Missoula Floods" later cut deep coulees and channels into the basalt flows.
The basalt surged to the surface through fissures - like cracks in the bottom of a row boat. The stack of basalt layers is more than 2 miles thick at some locations. More than 300 lava flows erupted.
Cascade volcanoes (Rainier, St. Helens, Hood, etc.) are not related to the Columbia River Basalt flows - The chemistry does not match! The Columbia River Basalts flowed from fissures to the east.
The Columbia River Basalts are believed to be connected to the hotspot now under Yellowstone National Park. Photos, video and map are used to illustrate.
Geologist make comparison between Columbia River Basalts and lava basalt flows in Hawaii.
Columbia River Basalt slideshow at: • Ice Age Floods - Colum...
This kind of pedagogy is one of the bigger reasons that I became a geology student in the first place. Thank you for making geology awesome!
Love your presentations! I learn a lot from your lectures and shows like this.
This is great stuff. Thanks for the great 2 minute lessons. I look them up & put them on my travel itinerary!
You're the best. I show my your videos to my Geology 101 students and the amazing visuals and clear explanations are really helpful to show the basic processes in the geology of Washington.
Very nice to hear that our videos are being helpful. Thanks.
Great to hear that you're learning a few new things, Taylor!
Research into the Missoula Floods brought me here. Great posts--thank you so much!
Thanks Mark.
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It's a great spot, Kyle. Just east of Black Lake near Othello, WA. Columbia Wildlife Refuge. We filmed the Columnar Show there. My hammer is still at the bottom of one of those cracks!
Bummer Kyle! Yes, the sweet columns are in the closed area. Next spring...
Are these eruptions related to the caverns and large lava river bed in Bend,Oregon? Just curious if they were in the same time frame? My family explored some of the lava caves there. Are there lava caves formed by these eruptions in the Columbia Basin?
Nice singing! The singing geologist!
Are not the layers a bit thick for Hawaiian type lava flow? Might there be another mechanism? What is underneath the basalt?
Great videos, especially since I live nearby. I do have a question, though. Why did the lava in Washington form into columns, while lava flowing In Hawaii does not? Different cooling conditions?
Good question. It's a lava flow thickness thing. The lavas in Hawaii are too thin to form columns, which need a thick lava flow that has stopped flowing and begins cooling from outside to inside. Thanks for watching.
Got it. Thanks!
Nick Zentner Thats not true.
The lava fields in Hawaii are true basaltic flows. Thinner lava would be expected to form these hex/poly columns much easier.
G. Muller, and others, (see: Journal of Geophysical Research, 1998) show how dessicating starch forms these vertical stacks of hexagonal shape.
The dessicating starch theory of how these columns formed shows that thinner columns are easier to reproduce, easier to get to act in this fashion.
The lava in hawaii is certainly thich enough to produce this pattern, if the pattern was there to be created.
Hawaiian lava is a perfect model for how basalt should act. Clearly, theres a signifigant diffeeence between how lava acts in its normal, natural state, and how the scientists say it theoretically does.
Sorry Vert, I'm with Nick on this.
People need to do their own research.
It's really this simple.
Alot of folks put all their trust and belief into the hands of experts: professionals, scientists, or those of other titles.
That's not me.
I can't simply blindly trust a human, simply because they have a title to their name.
If you have done your research, and hunted after knowledge as a hungry person looking for food; and your own mind, your working rational system, deduces the truth for you, then you have done the proper thing.
I don't have a career I'm here to support. I'm not looking for tenure.
I don't have professional "chops" which need to keep greased by foundation funding.
I've been posting to this topic: columnar "basalt", simply because it fascinates me. Reading on the minerals, lava, earth processes are endlessly fascinating to me.
I personally don't have an agenda I'm here to support.
I don't need people to follow me.
For me personally, I appreciate an informed discussion on the topic at hand; this is where I'm coming from
where is the bluff @ 1:30 to 1:40 in this video?
Thanks!
-Kyle
I'm somewhat familiar with the geology of the Great Basin and in particular the underlying forces that created the spreading centers, or basin and range topography of Nevada. I once heard a geologist say that that the Columbia R. Basalt Group was a consequence of the forces that shaped Nevada. This does not jibe with your notion of the Hot Spot (which I favor). Can you shed some light on this confusion of mine? Thanks! I enjoy your 2-minute videos!
When my teacher said a guy with a bow tie I was like nooooooooooo plz not Bill Nye but then I opened the link so I was like YAY!
Have you heard of the Lovejoy basalt in northern California? It's near where I live and I was wondering if the Columbia River basalts were related to the Lovejoy basalts since they are the same age
Just googled it - was not familiar. Am stunned to see a recent paper by well-respected geologists making a strong case for a connection with the CRB's in the PNW. Thank you. I will look into this.
Awesome! I live in the area and thought they looked similar
wow. I am going to endorse studying geology to my nephews now. thanks!
Great!
@@Ellensburg44 Please visit ;
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I think it's basalt, if there are plans to see this, I can take you.
0:54 is this in the frenchman coulee? I don't see chalk all over the wall so I can't tell
also where is that at 1:32? I like to climb those things
As icefox mentions, geologists are still trying to answer your questions! Basalt researcher/field mapper Steve Reidel is publishing some new work on this in Fall 2013. Not sure how to find it online, but look for it! He has some new data to help the timing questions.
Nick,
I made it out that way last weekend as well as frenchman and echo basins, unfortunately it coincided with the government shutdown so the access roads were closed. The surrounding land in the area is closed for the winter waterfowl refuge as well. Do you know if this particular cliff band is in the closure area?
Thanks!
-Kyle
How dumb is it to close down roads to remote areas because there's a cold going around? This country and the people in it have lost their minds.
Why such a dramatic difference between the flows here and the flows in Hawaii in terms of distance and volume?
Nice way to go Hawaii on 2 minutes!;)
That's wonderful, gcwarbler!
THankyou!! Are you a geography professor? And so romantic geography!!
That's actually a good question... not sure whether we really know the answers! The columnar basalts you see all over the place take years to cool down and form that sort of shape.
The obvious way is to do (volume of eruption) / (rate of lava erupted)... but while we can get a good handle on the volume of each eruption, how fast the lava was pouring out of the fissures is harder to get a handle on. There've been hundreds of eruptions though.
I love 2 minute geology!
Thank you.
This begs the question. How do hot spots form and how do they die? Is the process random?
Interesting, thank you.......
Thank you.
Good picks, what's with the neck bow?🤣
really need to put a map with arrows, .... show the direction fro yellowstone to mt riner
Imagine if we had a lava flow like that begin today. It would completely change the USA as we know it.
Why the columns,,,,?????!!🙏🌷
Yeah buddy!
Really nice comments, polapaul. Thanks so much!
I can't get enough of these PNW flood basalt videos. I mean that with sincerity. Im a huge fan. czcams.com/video/VQhjkemEyUo/video.html That one is my jam. I am a Michigan native and am in love with Michigan's robust geologic past. #postpenokeananorogenicmagmatism but I do love this non local Geology too. Please continue doing what you do.
Thanks Roscoe. All of my stuff is at nickzentner.com if interested.
dat bowtie!
These are actually tree stumps