Title: At the Vanishing Point
Subjects: United states, history, Paleo-Indians, Indians of North America, Antiquities, Dwellings, Prehistoric Land settlement patterns, Land use, History, Excavations (Archaeology), Environmental archaeology, Human ecology, Paleoecology, Desert ecology, Prehistoric Antiquities, Indiens du paléolithique, Colonisation intérieure, Types préhistoriques, Utilisation du sol, Histoire, Écologie humaine, Paléoécologie, Écologie des déserts, Holocene Geologic Period, Pleistocene Geologic Epoch