These two moderate-sized clams were found eroded out of siltstone beds in the Lower Topanga Formation. Their scientific name is Tellina oldroydi. They did not come out of the sandstone bed on which they are resting for picture taking purposes. Note that the two shells of the clams are still articulated (hinge together as in life). This indicates that they lived in a relatively quiet environment and were not washed around by strong currents after they died. Such an environment would have existed during deposition of the siltstone in which they were found.