Name:   Fossil Seed Fern Fronds Age:  Pennsylvanian Formation:  Llewellyn Formation Location:  Near St. Clair, Pennsylvania Size:  Plate is 9.5 inches across This is a very nice grouping of plants from the now-closed location at St. Clair, Pennsylvania. The fossils are preserved as a thin film of white pyrophyllite on black shale. There are three different types of ferns on the plate. The detail of the fossils is quite nice. The plants are nicely scattered about the plate of shale. This is a very fine example of fossil plants from the Coal Regions of Pennsylvania. This fossil was collected and obtained legally, and is also being sold legally.