Large St Clair Fossil Ferns Plate

Alethopteris c.f. serlii, Pecopteris sp., Sphenophylum

Geologic Time: Pennsylvanian (300 mya)

Size (25.4mm=1 inch): Largest specimen is 200 mm (8”) on a 230 x 350 mm plate (9.5 x 13.5”)

Fossil Location: Llewellyn Formation, St Clair, Pennsylvania

Fossil Code: PF10123

Price: $75.00 - sold

Description: The large two specimens appear to be Alethopteris c.f. serlii. St. Clair ferns are renowned for their beauty and preservation. The whitish deposit on many of the specimens is the characteristic that defines St Clair fossils and makes them instantly recognizable. Pyrophyllite (aluminum silicate, a whitish mineral) is believed to have replaced the pyrite at a later stage as the sediments piled up and the temperature and pressure became greater.

Fossil Sales

click fossil pictures to enlarge

Fossil Mall Navigation:

l Home l Fossils for Sale Map l Museum and Rare Fossils l How to Buy Fossils l

Navigate by Fossil Store:
l EDCOPE Enterprises l Western Fossils l Stonerelic l
l Pangaea Fossils l Primal Extincts l

Navigate by Fossil Category:
l Fossil Amber l Ammonites l Dinosaur and Reptile Fossils l
l Crinoids and Echinoderms l Fish Fossils l Insect Fossils l Invertebrate Fossils l
l Plant Fossils l Stromatolites l Trace & Ichnofossils l Trilobites l
l Russian Trilobites l Vertebrate Fossils l Fossil Kits l

Fossils & Science:
l Science Section l Paleobiology and Geological Timeline l The Fossil Dealers l