Thursday, October 29, 2009

Hemiaster Sea Urchin Fossil

This fossil is a Echinoderm (sea urchin) called Hemiaster sp. It existed in the Cretaceous Period about 100,000,000 years ago. The fossil was found in Tarrant County, Texas.

Thanks to Herb for the fossil. Apparently they are just found in this condition with no air abrasive cleaning needed.