Giant Clam Shell Fossil on loan from Keystone Gallery
This fossil was found, collected and prepared by Chuck Bonner, Keystone Gallery.
Plateceramus (pla- tee-ser’-a-mus) clams are covered with small fossil oysters, ostrea congesta. Since the ancient inland sea was silt covered, the oysters used the large clams as a stable attachment surface.
This beautiful clam is above average size and contains a “magic window” which allows a view of the smooth inside surface. It has a colorful rust patina caused by iron concentrations in the chalk.
April 12, 2019
Chuck Bonner, Keystone Gallery with Laurie Millensifer and Kirsten Dutten, BBCCC. Chuck supervised the installation of the 75 pound Clam Shell in the display case.