| Part and counterpart of a leaf from an alder paleobotanists refer to as Alnus jarbidgiana, the most common fossil plant species found in the upper Eocene Dead Horse Tuff, as exposed in the Copper Basin district, Great Basin, Nevada. The carbonized specimens are 38 to 39 million years old. A screen shot from a video uploaded to YouTube by Crime Pays But Botany Doesn't; I edited and processed the image through photoshop. |