Re:Have we already been visited by aliens?
by itronitron on Wednesday January 20, 2021 @01:59PM
(#25850416)
Bretz defended his theories, and this kicked off an acrimonious 40-year debate over the origin of the Scablands. Both Pardee and Bretz continued their research over the next 30 years, collecting and analyzing evidence that led them to identify Lake Missoula as the source of the Spokane flood and creator of the channeled scablands.
https://en.wikipedia.org/wiki/Missoula_floods
Also Plate Tectonics...
https://en.wikipedia.org/wiki/Timeline_of_the_development_of...