Pyrite of the Waldron Shale

 Pyrite crystals found in the Waldron Shale of Clark County Indiana. It is from the Silurian Period.

Calcite Filled Platystrophia Brachiopod

These images are of a broken open Platystrophia sp. brachiopod fossil. The picture reveals calcite crystals. This fossil was found in Bullitt County, Kentucky in Ordovician Period rock.

Cretaceous Turritella Fossil

Gastropod fossil called Turritella sp. from the Cretaceous Period (about 70 million years ago). It was found near Tupelo, Mississippi.