Great Site Don! I have seen a site at Humboldt a few years back which looks similar but obviously much work has been done since...

My questions are why now is this information being published? I suspect they used GPS to confirm something they already knew and this added scientific findings to the Theory....and remember Plate Tectonics is almost universally accepted BUT it is still a Theory! This leaves room for the more exploratory-minded geologist to interact with archaeology and the the philosophers! Not too many around and usually very egotistical but never-the-less it makes for fun!

Bob