I believe most of the lithics on the site settled, or where deposited close to, that clay layer. In this location it seems that the fossils and artifacts are coming out from the top of the clay, not too far into it. Horse, Mammoth, tapir, dire wolf, turtle, etc. etc., mostly broken pieces and many of them from near the lithics are scored/cut marks and hollowed out. Found a fist sized piece of mammoth leg bone like a square, with two ends definitely smoothed straight.....