Calaveras-Baker #36 in the Western Cordillera

Calaveras-Baker

Basement domain in the Western Cordillera

Geologic information

Region	Western Cordillera
Crust	Type: Accretionary wedge Formation age: 315-215 Ma
Accretion	Type: Collisional Age: 135 Ma

Geographic extent

Amador, Butte, Calaveras, El Dorado, Mariposa, Nevada, Placer, Plumas, Shasta, Sierra, Siskiyou, Tehama, Tuolumne, Adams, Washington, Baker, Crook, Deschutes, Grant, Harney, Jackson, Jefferson, Klamath, Lake, Malheur, Umatilla, Wheeler

Bibliographic references

Hacker, B.R., 1993, Evolution of the northern Sierra Nevada metamorphic belt—Petrological, structural, and Ar/Ar constraints: Geological Society of America Bulletin, v. 105, p. 637–656.Vallier, T.L., 1995, Petrology of pre-Tertiary igneous rocks in the Blue Mountains region of Oregon, Idaho, and Washington: Implications for the geologic evolution of a complex island arc, in Vallier, T.L., and Brooks, H.C., eds., Geology of the Blue Mountains region of Oregon, Idaho, and Washington—Petrology and tectonic evolution of pre-Tertiary Rocks of the Blue Mountains region: U.S. Geological Survey Professional Paper 1438, p. 125–209.Dickinson, W.R., 2008, Accretionary Mesozoic-Cenozoic expansion of the Cordilleran continental margin in California and adjacent Oregon: Geosphere, v. 4, p. 329–353.Dorsey, R.J., and LaMaskin, T.A., 2007, Stratigraphic record of Triassic-Jurassic collisional tectonics in the Blue Mountains Province, northeastern Oregon: American Journal of Science, v. 307, p. 1167–1193.