| Exposures of the late Pleistocene Rogers Lake Beds in Death Valley National Park. The outcrop consists of fine sands, silts and clays that accumulated roughly 15 thousand years ago in ancient Lake Rogers, a geologic contemporary of famous Lake Manly, which covered the floor of what is today modern Death Valley to a maximum depth of over 600 feet during its highest stand 185 to 160 thousand years ago. Occasionally, vertebrate fossils from several varieties of late Pleistocene animals weather out of the Rogers Lake Beds. |