Fish Fossil - Knightia Eoceana Ruby or white lead ore

or white lead ore

which over the course of millions of years becomes solid while retaining the semitransparent yellowish hue of tree sap

almost unmistakable for any other species

sometimes including growth rings

Amethyst is often found in spectacular geodes

Fish Fossil - Knightia Eoceana Ruby or white lead oreDuring 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