My favorite purchase of the day was this...
|Fossil Cockles from the Pliocene Epoch|
These are fossils of an extinct species of cockle (clam) named Clinocardium meekianum. The fossils are from a rock formation known as the Rio Dell Formation in coastal Humboldt County, CA and date to the Pliocene Epoch (5.33 to 2.58 million years ago). Each individual shell measures approximately 2.5 to 3.0 inches (6.35 to 7.62 centimeters) across. The group measures about 6 inches by 7 inches.
|The underside of the sample|
Rather than being used in classroom presentations, this specimen is destined for a shelf at home next to several other fossils.