Took final photos of SLT4 in late afternoon. Tomorrow will move 3 workers to SLT6. In SLT4 came down on clay floor which we leveled off and photographed. Floor is locus 4. The cobbles on the floor don't seem to be amounting to anything. Just above floor in locus 3 collected a large basalt groundstone (Ar/Ts.SLT5.3.L.1). Also took radiocarbon sample from floor (Ar/Ts.SLT5.4.C14.1) which may help clarify the EIA vessel found yesterday.