Today the area is usually referred to as the High Plains, and the original term is sometimes used to describe the arid region of North America, which includes parts of northwestern Mexico and the American southwest.
^Darton, N. H. (1920) Syracuse-Lakin folio, Kansas. United States Department of the Interior, U.S. Geological Survey, Folios of the Geologic Atlas, No. 212, 10 pp. (See Plate 2)