A promising field for sites of ancient man lies in the region of the Estancia Valley, central New Mexico. This area was covered by the vast, extinct Pleistocene Lake Estancia, estimated by Antevs to have been at its height 15,000 years ago. The lake covered approximately 450 square miles and had a maximum depth of about 150 feet. Today, evidence of the lake remains in the form of beach terraces and gravels. Some 160 miles to the east are the Clovis sites excavated by Howard, while about thirty miles to the west is Sandia Cave, a site of ancient man excavated by the University of New Mexico.
