Contribution to Books
The geological framework for western North America consists of physical landscapes (geomorphic features) and stratigraphic sequences that can be used to provide a basis for understanding the chronologic and environmental context for Late Pleistocene human populations. The Western Area includes the region of North America from the Pacific coast to the Rocky Mountains and parts of the Great Basin and Colorado plateau (figs. 1-2).
Hill, Christopher L.. (2006). "Geologic Framework and Glaciation of the Western Area". Handbook of North American Indians, 347-60.