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Reelfoot rift (was Re: SAUROPOD RESTING)

"James R. Cunningham" <jrccea@bellsouth.net> wrote:

If any of you are interested in geology, the inclusion is circular, about
42.5 nautical miles in diameter
I first thought it was an unrecorded impact crater, but a bolide small
enough to generate the structure wouldn't have had enough energy to create a
crater that would
have survived so long.

A question asked in near-total but honest ignorance here...

If it's circular, and it's not an impact crater, then what is it?

Jeffrey Willson <jwillson@harper.cc.il.us>