[imardmd1]

A much more detailed description of the tectonic shift is fount in Wal Brown's Hydroplate Theory (click here).

(He is of the same generation as Morgan, as am I. My 87th birthday was last Wednesday, I thought the sames as y'all regarding the coastline formation being the ruptre of a brittle sphere in this same time-frame, but had no interest in chasing it down, until obtained Walt Brown's textbook on it.)

[TexasGator]

Walter Brown’s “Hydroplate” Flood Model Doesn’t Hold

Waterhttp://www.paleo.cc/ce/wbrown.htm