White fronds on black shale excavated from Llewellyn Formation, St.Clair, PA.
Measurements: Spans 14" left to right, 6.5" up to down, and almost 1" thick.
This is the exact specimen you will receive. Pictures are taken in natural sunlight, and are not altered in any way.
Age: Paleozoic > Carboniferous > Pennsylvanian
Believe it or not, the colors are natural! It is this exceptional state of preservation that gives the St. Clair, Pennsylvania fossil ferns their great exquisiteness. It's hard to comprehend 100 years, let alone 3 million times that many, but these ferns died around 300 million years ago!
These natural wonders fell into a bog where a low temperature, low pressure, oxygen depleted environment evolved the plant tissue into Pyrite. Pyrophyllite(Aluminum Silicate) replaced the Pyrite at an ensuing stage, creating the bold, white color. Any orange-ish color was caused naturally by the presence of iron ore. We never paint or touch them up. Nature and time are the artists. This unique type of preservation makes these specimens perfect for mineral collecting as well as fossil collecting.
Dozens of plant species are found in these shales, so look closely. Common species include Alethopteris, Neuropteris, Pecopteris, and Sphenophyllum. Seed ferns went completely extinct around 73 million years ago, while the dinosaurs were still around! This would be a perfect addition to anyone's fossil collection!
Payment: PAYPAL PREFFERRED, but we accept money orders as well. Payments must be made immediately to get the item off our shelf. If paying by money order, a USPS money order is prefferred and will ship same day. All other money orders must clear my bank before I mail the specimen. money order customers: please contact me once you mail the money order so I know when to expect it, and I can mark the item as sold.
United States buyers only please. Shipping rocks out of country is outrageously expensive, so if you are an out of country customer, please be aware of that fact. I do not have control over shipping prices, and USPS has recently discontinued boat mail.