| An isolated look at the carbonized quaking aspen leaf--called scientifically Populus pliotremuloides--seen in an image at the main page of this web site. The specimen is 60 millimeters long. Specimen came from the upper Miocene Hunter Creek Sandstone near Verdi, Washoe County, Nevada, a geologic rock deposit dated by radiometric analyses at 5.8 million years old. Photograph originally taken with a Minolta 35mm camera. |