1 bedrock mortar with a pestle or hammerstone
Elevation 442 ft.
We found this mortar and its in situ pestle or hammerstone on the bank of Round Valley Creek.
Bob illustrates how the pestle/hammerstone might have been deployed. The user would probably have straddled the mortar, however.
A closer look at the pestle/hammerstone snugly ensconsed in its mortar.