Fern fossil, Sphenopteris pottsvillea, Pennsylvanian age 300 million year old

Description

This is a 7" x 5.5" x 1.5" Pennsylvanian age, 300 million year old fossil fern named Sphenopteris pottsvillea with compound leaves of the fern imprinted on a sandy siltstone.  The imprints show great detail and the original plant material is preserved as coal.  There are additional prints on the reverse side of this piece.  This came from a coal mine in Alabama.  Nicely presented and will make a nice addition to your collection.