Clam Fossil from Madagascar Jurassic - 2.8" Polished Bivalve Mollusk 160 grams

Description

Dimensions:  2.8" x 1.9" x 1.2"
Weight:  160 grams (5.6 oz)
This polished Clam Fossil from Madagascar is about 150 million years old, dating from the Jurassic Period.  Clams have a long fossil history, first appearing in the late Cambrian Period, about 510 million years ago.  You'll receive the exact Clam Fossil shown in the pictures.  Notice the visible external growth rings that accumulated as the clam got older!
Clams are bivalve mollusks, so-called because their shells consist of two parts called valves.  The valves are attached by a hinge ligament, and are opened and closed by two muscles attached on the inside of the shells.  Clams are filter feeders that pump water inside their bodies to strain out phytoplankton and other small organisms for food.
Please visit my store, Mother Lode Rock Shop, for more Clam Fossils and other Rocks, Minerals, and Fossils.  Thank you for looking.