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Post by Son Of Beach on Nov 3, 2021 8:49:06 GMT -5
30 Foot ash beds you say??
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Post by opalpyrexia on Nov 3, 2021 10:01:37 GMT -5
Very interesting; thanks for posting this. I'm at about the halfway point, but I'll come back to finish it.
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RWA3006
Cave Dweller 
Member since March 2009
Posts: 4,597 
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Post by RWA3006 on Nov 3, 2021 12:11:58 GMT -5
Never heard of fossilized hail stones before.
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Post by Son Of Beach on Nov 3, 2021 12:53:43 GMT -5
Yea, that was wild. It's hard to fathom the scene of that explosion.
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Post by mohs on Nov 3, 2021 14:37:09 GMT -5
Never seen this one
Nick is always animated
- like time elapsed tectonic plates
moving over super magma dwell -
and informative
which means… I really enjoy his vids!
get condused w/ all the different geology layers
not sure if i'm holding phyllitic schist or gneiss welded tuff ?
o well… for me it keeps my interest
never new about the Ashfall Fossil Beds in Nebraska
A prehistoric Pompeii !
Which really interests me
Especially the ash cover scrolls at Herculaneum
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Post by Son Of Beach on Nov 5, 2021 23:19:17 GMT -5
Some more overviews and guides. I've yet to fully explore these, just found them in the last few days.
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Post by Starguy on Nov 7, 2021 10:38:37 GMT -5
Pretty interesting geology in the PNW. I’m fascinated by the recurring floods from Lake Missoula. They formed the channeled scablands in central Washington. A geologist by the name of Harlan Bretz first recognized the signs of flooding. It was controversial at the time but is pretty well accepted now.
We also had Miocene lake Clarkia which laid down to fossil beds near Clarkia Idaho. I feel like the repeat filling and emptying of lake Clarkia was the high energy event(s) that concentrated the garnets found in layers in Emerald Creek.
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Post by Son Of Beach on Nov 7, 2021 20:25:24 GMT -5
Pretty interesting geology in the PNW. I’m fascinated by the recurring floods from Lake Missoula. They formed the channeled scablands in central Washington. A geologist by the name of Harlan Bretz first recognized the signs of flooding. It was controversial at the time but is pretty well accepted now. We also had Miocene lake Clarkia which laid down to fossil beds near Clarkia Idaho. I feel like the repeat filling and emptying of lake Clarkia was the high energy event(s) that concentrated the garnets found in layers in Emerald Creek.
It all kind of fits when you start to put the pieces together. How does the filling and emptying of Lake Clarkia equate to garnets?...excuse my ignorance on the matter.
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Post by Starguy on Nov 7, 2021 20:50:15 GMT -5
Son Of Beach Garnet Is pretty heavy (dense). It takes a high energy event to move them around and concentrate them in layers.
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Post by Starguy on Nov 9, 2021 15:36:50 GMT -5
Speaking of PNW geology
I lived through Mount St. Helens.
On May18, 1980 I put out a napkin to try to catch some dust from the eruption. May 19, 1980 was the most surreal day of my life. There was over a half inch of the finest, driest gray dust everywhere. The speed limit on Interstate 90 was reduced to 10 MPH.
I’ve lived through and felt several earthquakes. It amazes me that geologic events hundreds of miles away can affect me at home. Geology is so cool.
I can still find Mt St. Helens ash by digging down a little.
I have a bucket full of ash if anybody wants some.
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Post by Son Of Beach on Nov 9, 2021 16:07:50 GMT -5
Speaking of PNW geology I lived through Mount St. Helens. On May18, 1980 I put out a napkin to try to catch some dust from the eruption. May 19, 1980 was the most surreal day of my life. There was over a half inch of the finest, driest gray dust everywhere. The speed limit on Interstate 90 was reduced to 10 MPH. I’ve lived through and felt several earthquakes. It amazes me that geologic events hundreds of miles away can affect me at home. Geology is so cool. I can still find Mt St. Helens ash by digging down a little. I have a bucket full of ash if anybody wants some. I would love to experience something like that, bigger than everything else for those few days. That whole is full of so much volcanic history. Here in MI we had a 4.5 earthquake and it was awesome lol...I remember it well. |
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Post by Son Of Beach on Nov 9, 2021 16:22:46 GMT -5
How to spot the difference between sandstone and ancient lahars
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Post by Starguy on Nov 10, 2021 19:07:41 GMT -5
Son Of BeachWe had a 6.5 magnitude earthquake in 2020. I thought my wife was behind me rocking my chair. Then I noticed our dining room chandelier rocking back and forth. It lasted around 8 seconds. No damage done but it was really cool
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