Ferns first evolved in the late Devonian Period, about 360 million years ago, and were common in the Carboniferous Period which followed. The second half of the Carboniferous Period is known in North America as the Pennsylvanian Period, named for the widespread coal deposits created during this time in the state of Pennsylvania. Fern fossils are common in several of Pennsylvania's fossil grounds.
This collection of fern fossils date from the Pennsylvanian Period (323 to 298 million years ago).
NOTE: The item photographed is similar to the one you will receive. These fossil ferns are approximately 2" in length, and weigh about 0.6 ounces each. Region of origin: St. Clair, Pennsylvania.