Pyritized Fossil Crinoid Plate Arthroacantha carpenteri & Paraspirifer bownockeri...

Pyritized Fossil Crinoid Plate Arthroacantha carpenteri & Paraspirifer bownockeri Devonian Silica Formation Sylvania, Lucas County, Ohio As if the inherently flowering shape and form of fossil crinoids were not enough, this example featuring a single, artistic Arthroacantha, and an abundance of secondary brachiopods of the Paraspirifer variety, also happens to be pyritized, resulting in fossilization with a visually striking metallic appeal. The highly detailed parts of the ancient sea creatures are enhanced by the natural phenomenon, and the example is also rather amazing as expert preparation has revealed the most minute attributes of this fossil which is comprised of a complex stalk with the unique form of the genera and a partial columnal stalk. An aboral cup is attached to the two segments, and all of the metallic residents are presented on a 'classic' gray matrix. Overall Measurements: 7.87 x 4.53 x 1.54 inches (20.00 x 11.50 x 3.90 cm) HID09710052018 © 2022 Heritage Auctions | All Rights Reserved