Fragment of the extinct arborescent (tree-like) horsetail Calamites discifer (Weiss, 1876) with large branch scars. The specimen found on a burned mine heap hence the brown color of the fossil. Age: Carboniferous, Westphalian B, Orzeskie Beds Locality: Poland, Upper Silesia, Radlin Matrix size: 124 x 79 x 46 mm Weight: 407 g If you have bought several items, combined shipping is possible. Please contact me.