Do the mounds depict the Gulf of Mexico and the Yucatan (as an island) in the BC years? Page 37, PreColumbian Architecture in Eastern North America shows 3 mounds, one shaped like a wide V and two shaped like a circle, rectangle. The V shaped mound is reminiscent of the Yucatan shape separated from the neck of Mexico (hooked to Texas) and separated from Guatemala at Atitlan. If you look at Earthviewer ([url=http://WWW.FORMILAB.CH/EARTHVIEW) there are two notches, one on the Yucatan plate and an inverted one off Cape Canaveral, Florida. Is that where the Yucatan was a long time ago?