Later.
dates are a problem with this one, no?
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No, not really. I came across the name W F Prouty in 'An Address Before the Graduate College Forum of Princeton University on October 14, 1953' of which the title was 'Worlds in Collision in the light of Recent Finds in Archeology, Geology and Astronomy.'
It's a supplement to my copy of Earth in Upheaval...in which Velikovsky writes:
'The tens of thousands of oval formations on the Atlantic coast of the United States, especially in the Carolinas, some of them attaining a length of a few miles each, were conclusively identified, in a monograph by W. F. Prouty (1952), as having been caused by the fall of large meteorites. And finally, the largest crater formations, situated in Quebec north of Sept Iles, in Canada, and occupying an area of 680 square miles, is under investigation as to its meteroric origin by a group of Mines Department scientists led by Dr. J. S. Innes.'
I picked up the link I posted whilst looking for W.F. Prouty's work. IMO all the heavy lifting on this subject was done in the 50's...but that's just me...