Saturday, November 19, 2011
The Placenticeras whitfieldi ammonite fossil displayed at the Carnegie Museum of Natural History in Pittsburgh, Pennsylvania (July 2011). This fossil was found in the Black Hills of South Dakota. The creature swam the Western Interior seas of the Upper Cretaceous (Mesozoic Era). Its Carnegie museum accession number is CM 29833.
Visit the Carnegie museum web site: http://www.carnegiemnh.org/