These pictures are of plant fossils from St. Clair, Pennsylvania. These plants grew in the Late Carboniferous or Pennsylvanian Period and...

These images show what appears to be the front part of a cephalon of an Acidaspis trilobite fossil. It was found in the Kope Formation of...

I believe this graptolite fossil is of the genus  Geniculograptus . The fossil was photographed under a microscope at 23 magnification. T...