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Post by 1dave on Feb 4, 2018 13:59:05 GMT -5
Nick Zentner presented the most informative hour of my life - ending with logs buried in a flood basalt!  If you happen to be in the area, take Nick Zentner up on his offer to attend his classes for free! BTW, and IMO, The huge amounts of energy required to initiate the huge flood basalt flow of the ancient past could only have come from immense asteroid impacts. |
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Post by 1dave on Feb 4, 2018 15:42:25 GMT -5
More from Nick
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Post by woodman on Feb 4, 2018 17:04:32 GMT -5
more informationFrom Oregon State University. In the columbia river gorge that are many layers of basalt flows one on top of each other formed over millions of years. The earth was a much more active place than it is now. IMHO asteroid impacts had nothing to do with it, but what do I know.
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gemfeller
Cave Dweller 
Member since June 2011
Posts: 4,059 
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Post by gemfeller on Feb 4, 2018 17:26:21 GMT -5
Man, how I wish I could hear these or that they had closed captions (hearing impairment). Both those subjects are close to my heart, having grown up on the edge of the Snake River Plain. The great flood basalts of the NW have always intrigued me, as has the Yellowstone Hot Spot and its relationship to them. I even wrote an article for National Geographic (purchased but sadly -- to me -- not published) about the enormous springs along the Snake River resulting from volcanic displacement of the river from its original course to the north.
Geological knowledge of that region has increased almost exponentially since the time I wrote it and I'd love to catch up. I've always considered the probability that Hot Spots, as well as diatremes, were caused by asteroid impacts. It would take enormous energy to open up a passageway to the depths of the Earth needed for both. I haven't run across any other explanation that makes sense though I'm not ruling one out.
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Post by 1dave on Feb 4, 2018 19:30:01 GMT -5
Man, how I wish I could hear these or that they had closed captions (hearing impairment). Both those subjects are close to my heart, having grown up on the edge of the Snake River Plain. The great flood basalts of the NW have always intrigued me, as has the Yellowstone Hot Spot and its relationship to them. I even wrote an article for National Geographic (purchased but sadly -- to me -- not published) about the enormous springs along the Snake River resulting from volcanic displacement of the river from its original course to the north. Geological knowledge of that region has increased almost exponentially since the time I wrote it and I'd love to catch up. I've always considered the probability that Hot Spots, as well as diatremes, were caused by asteroid impacts. It would take enormous energy to open up a passageway to the depths of the Earth needed for both. I haven't run across any other explanation that makes sense though I'm not ruling one out. A few of his presentations don't have CC, but I have read them in many. The only other source I can come up with is continental collisions, but the timing seems wrong. |
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Post by 1dave on Feb 4, 2018 19:37:10 GMT -5
more informationFrom Oregon State University. In the columbia river gorge that are many layers of basalt flows one on top of each other formed over millions of years. The earth was a much more active place than it is now. IMHO asteroid impacts had nothing to do with it, but what do I know. Our past is littered with impacts 500 miles in diameter and larger. divide by 10 to get the size of impact object. Speed = 17-50 miles per second. Ocean crust thickness = 5 miles, continental up to 35 miles. There are more on their way. Many from the "string of pearls" produced earth sized scars on Jupiter. |
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