Gastropods (genus Physa) and ostracods (a bivalved crustacean) from the Pliocene Copper Canyon Formation, Copper Canyon, Death Valley National Park.

A representative gastropod specimen on the chunk of bioclastic limestone lies just to the left of the letter G. Several other gastropods reside on the sedimentary matrix.

A representative ostracod fossil lies just to the right of the letter O. Several other ostracods of the genera Eucypris and Darwinula reside on the sedimentary matrix.

Image modified from an original photograph courtesy Torrey Nyborg.