SFGTV January 6, 2012
the first one is determining where we were going to do archaeology. we start with the geotechnical area that shows basically the area underneath. there are three areas we're particularly interested in. one is the top of the sand formation. that is the orange band. that was ground surface during the ice age, which is when people first entered the area, then there it is the dune sand, which is near the top here. it is the orange color. that was the sand dunes that surrounded san francisco bay during the time of the native american occupation. above that there is a layer filled, which i...