Invertebrate fossil, GSA Mesozoic number 1869, from the GSA Mesozoic invertebrate paleontology collection. This specimen box contains 2 specimen(s) of the Oyster Exogyra costata Say from the Cretaceous Demopolis Chalk Formation in Sumter County, AL, USA.
Summary
Invertebrate fossil, GSA Mesozoic number 1869, from the GSA Mesozoic invertebrate paleontology collection. This specimen box contains 2 specimen(s) of the Oyster Exogyra costata Say from the Cretaceous Demopolis Chalk Formation in Sumter County, AL, USA.
