This Cretaceous Period fossil is called Serpula sp . They are worm/annelid tubes. This specimen was found in Tarrant County, Texas. Thanks...

This oyster fossil is called Exogyra sp . It is from Tarrant County, Texas and existed in the Cretaceous Period. Thanks to Herb for the fos...

The Indiana Memory Collection website contains a number pictures of corals found at the Falls of the Ohio State Park ( Clarksville , Indiana...