Igneous

Bullock, J.H., Jr., Vaughn, R.B., Smith, D.B., Welsch, E., and Fey, D.L., 1989, Analytical results and sample locality map of stream-sediment, heavy-mineral-concentrate, and rock samples from the Trigo Mountain Wilderness Study Area (AZ-050-023B), La Paz County, Arizona: U.S. Geological Survey Open-File Report 89-0472, 24 p., 1 sheet, scale 1:50,000.

Armstrong, R.L., and Suppe, John, 1973, Potassium-argon geochronometry of Mesozoic igneous rocks in Nevada, Utah, and southern California: Geological Society of America Bulletin, v. 84, no. 4, p. 1375-1391.

Arculus, R.J., Ferguson, J., Chappell, B.W., Smith D., McCulloch, M.T., Jackson, I., Hensel, H.D., Taylor, S.R., Knutson, J., and Gust, D.A., n.d., Eclogites and granulites in the lower continental crust: Examples from eastern Australia and southwestern U.S.A., in Smith, D.C., ed., Eclogites and related rocks: Amsterdam, Elsevier, in press.

Annis, D.R., and Keith, S.B., 1985, Petrochemical variations in late Cenozoic igneous rocks in Arizona: Implications for geotectonics and metallogeny [abs.]: Geological Society of America Abstracts with Programs, v. 17, no. 6, p. 338.

Anderson, C.A., 1951, Older Precambrian structure in Arizona: Geological Society of America Bulletin, v. 62, p. 1331-1346.

Akers, J.P., Shorty, J.C., and Stevens, P.R., 1971, Hydrogeology of the Cenozoic igneous rocks, Navajo and Hopi Indian Reservations, Arizona, New Mexico, and Utah: U.S. Geological Survey Professional Paper 521-D, 18 p.