| A prominent exposure of sands, silts and clays assigned by geologists to the late Pleistocene Rogers Lake Beds, Death Valley National Park--rather loosely consolidated lacustrine (lake-deposited) sedimentary material that accumulated some 15 thousand years ago in ancient Lake Rogers, an arm of famous Pleistocene Lake Manly that 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, fossil bones from a variety of Pleistocene animals weather out of the Rogers Lake Beds. |