Great Basin section
|Great Basin section|
|Location||western United States|
|Area||170,000 sq mi (440,298 km2)|
|Biome||Central Basin and Range ecoregion|
The Great Basin section is a physiographic area which extends into the Colorado River watershed on the southeast (including the Las Vegas Valley and northwest corner of Arizona), as well as into the watersheds of the Klamath River (northwest) and Sacramento River (west). The largest section of the Basin and Range Province was originally defined as two sections in 1917 (the northwest was the Oregon lakes section).
The Great Basin section's northern border in Nevada is a portion of the Great Basin Divide, the southern border extends into the Mojave Desert, and the western border is primarily the Sierra escarpment. Small portions of the section extend into the Northern Basin and Range (ecoregion) and the Sonoran Desert Level III EPA ecoregions.</ref>
- "Physiographic Regions". United States Geological Survey. 2003-04-17. Retrieved 2008-01-30.
- Fenneman, Nevin M. (January 1917). "Physiographic Subdivision of the United States". Proceedings of the National Academy of Sciences of the United States of America 3 (1): 17–22. OCLC 43473694. PMC 1091163. PMID 16586678. Retrieved 5 October 2010.
- "Automated IFSAR Terrain Analysis System". Defense Advanced Research Projects Agency (DOD), Information Sciences Office. 31 August 2001. Retrieved 5 October 2010.
- Fenneman, Nevin Melancthon (1931). Physiography of western United States. McGraw-Hill. OCLC 487636.
- Fenneman, Nevin Melancthon (1938). Physiography of eastern United States. McGraw-Hill. OCLC 487628.
||Middle Cascade Mountains (23b)||Columbia Plateau (20)||Rocky Mountains (20)|
|Sierra Nevada Mountains||Colorado Plateau|
|Sonoran Desert (22b)||Grand Canyon (21e)
Mexican Highland (22d)