Fish Fossil - Knightia Eoceana Geode or the formation of equally

or the formation of equally thin layers of secondary minerals due to hydrothermal or other alteration

sometimes in the same formations

some with highlights of purple or blue around the outer edges

a ghost or phantom of the crystal during its formation still remaining in the interior

are found in a matrix of thick

Fish Fossil - Knightia Eoceana Geode or the formation of equallyDuring the Eocene, 40 50 million years ago, vast shoals of freshwater fish inhabited a large shallow inland sea across the American West. The herring like fish of the genus Knightia were far and away the most abundant freshwater fish during this era, and because of this they are one of the most frequently found vertebrate fossils on earth. Originating from the famed Green River Formation in Wyoming, fossils of Knightia eocaena and their close