[trad_anglican]

I remember seeing a theory that the Great Basin in the cental U.S. was formed by a huge lake that was suddenly emptied, perhaps due to volcanic activity in the Yellowstone area. Don’t remember the time frame that was posited for it, though.

[Constitutions Grandchild]

Me, too. Not sure of time frame, either.

[glorgau]

I remember seeing a theory that the Great Basin in the cental U.S. was formed by a huge lake

See Fort Rock, OR. The wave terraces are about 150 feet up.

[Lucius Cornelius Sulla]

” http://en.wikipedia.org/wiki/Lake_Bonneville “