And the map keeps changing. There is a large area of Eastern Oregon, Southern Idaho. N.Nevada, clear to the Rockies by the Great Salt Lake known as the Great Basin. It was once full of water to about 5,000 feet elevation. All that’s left is Salt Lake and Malheur lake in Oregon. It started draining when the Columbia Gorge broke thru.
The University of Oregon has a dig going on the high water mark in Eastern Oregon. So far they’ve dated their hole to 18,000 years and they’re still digging. They haven’t published details yet but have found tools, etc. pretty much all the way down. What they’ve published so far has pushed back the old genius estimates for the area by over 10,000 years. Interesting side note is that when the water level was high there was not much dry land. Just islands made by the high peaks. So they seem to have eaten more fish than game.
Someplace down that hole they’ll probly find an old Ford factory? Could be where the Egyptians got their enviro friendly chariots?