State Fossil - Brachiopod

This specimen is a Platystrophia ponderosa. Brachiopods are marine invertebrates with two dissimilar shells. They are very common in Paleozoic strata (especially in Ordovician, Silurian, Devonian and Mississippian rocks in Kentucky). Shells may be replaced with either calcite or quartz. Generally, the size of the fossils are less than 2 inches in width.