Invertebrate fossil sample, GSA Cenozoic number 21691. A fossil sample of the Miocene clam , Chlamys madisonius, from the geologic unit Chesapeake Group, collected from the county of Calvert, MD, USA.
Summary
Invertebrate fossil sample, GSA Cenozoic number 21691. A fossil sample of the Miocene clam , Chlamys madisonius, from the geologic unit Chesapeake Group, collected from the county of Calvert, MD, USA.