Description: 6.2" Alethopteris Fern Plant Leaf Fossil Carboniferous Age Llewellyn FM ST Clair Location: Llewellyn Formation, St Clair, Pennsylvania Weight: 8.3 Ounces Dimensions: 6.2 Inches Long, 3.1 Inches Wide, 0.8 Inches Thick (Plate) Come with a Certificate of Authenticity. Comes with a Free Stand. The item pictured is the one you will receive. Pennsylvanian Age, 300 million-year-old. Alethopteris Sp Fern Fossil These plant fossils were found in the Llewellyn Formation (300 mya, Pennsylvanian Period) and are one of the few places where one can find these very detailed white (sometimes yellow) ferns on a striking contrast of black shale. The plants died and fell into the swamp, wherein in a low temperature, pressure, and oxygen environment the plant tissue was slowly replaced by pyrite (from sulfides). 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. The ferns most commonly found are Alethopteris, Neuropteris, Pecopteris, and Sphenophyllum. Fossil Plants are generally Carboniferous in age or younger. Some of the most common types of fossil plants include ferns, horsetails, and club mosses. At the end of the Carboniferous, the tree-shaped clubmosses and horsetails declined, mainly because the swamps were disappearing and because it became colder on Earth. Still, there were some coal swamps in the earliest part of the Permian. In that region coal seams combined with plant layers and root, layers have been formed in the same way as the Carboniferous. Excellent fossils are generally easy to collect from layers of thinly laminated shales, which split open with the tap of a chisel or a splitting hammer. Some entire families of plants are now extinct, such as Macroneuropteris. Shipping Payments Terms of Sale Contact Us We offer combined discounted shipping on purchases made the same day. If your using PayPal payment we only ship to the shipping address specified on PayPal. Most orders are shipped with the United States Postal Services with tracking. All shipments will be shipped within 24 hours except Sundays Signatures are required on all purchases over $100 USD All payments must be made within 72 hours of placing your order. UNCONDITIONAL RETURN POLICY At Fossil Age Minerals, customer service and satisfaction are our highest priorities. Because your positive buying experience is very important to us, Fossil Age Minerals has an Unconditional return policy if: 1. All returns must be in their original state. 2. All return requests are made within 30 Calendar days of receipt of merchandise. You can contact us between the hour of 9:00AM - 8:00PM Central time Mon - Fri. We are closed on weekends and holidays.
Price: 32.99 USD
Location: Post Falls, Idaho
End Time: 2024-11-07T16:04:17.000Z
Shipping Cost: 4.99 USD
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Return shipping will be paid by: Seller
All returns accepted: Returns Accepted
Item must be returned within: 30 Days
Refund will be given as: Money Back
Return policy details:
Country/Region of Manufacture: United States
