One
of last year's trenches at site A11-10.One
of last year's trenches at site A11-10.
One of the sandy units, the topmost C unit, is visible on the back wall of the trench. We plan to excavate 1 meter further out to each side this year and close to five meters deeper into the hill to document the fossils and stone tool technologies preserved at the site. The density of artifacts here is truly amazing. A stone tool in situ, eroding out of the wall, can be seen about halfway between the two packs at the very top of unit C. Our best evidence is that the sand in this layer was deposited in some sort of washout event that blanketed an ancient valley floor about 650,000 years ago, and early humans then deposited the tools on the surface.