The pieces of the formation of the Brachiopod are about 1". Following the death of these organisms, wave action concen-trated their hard parts into lens-shaped deposits. Today we find these concentrations of shell and skeletal matter exposed as rock. The representative of or-ganisms that lived 65 million years later than the ones. The fossils found in the concentrated zones are mostly in-ternal and external molds of brachiopods.