He recognized and determined a total of 22 distinct layers, of whom 19 were of the pleistocene period, that yielded numerous stone and bone tools, ivory jewelry, human skeletal remains and pottery shards.
He recognized. He determined a total of 22 distinct layers.19 were of the pleistocene period of 22 distinct layers. The pleistocene period yielded numerous stone and bone tools. The pleistocene period yielded ivory jewelry. The pleistocene period yielded human skeletal remains. The pleistocene period yielded pottery shards.