Xenoliths

Helmstaedt, H.H., and Schulze, D.J., 1991, Early to mid-Tertiary inverted gradient under the Colorado Plateau: Evidence from eclogite xenoliths in ultramafic microbreccias, Navajo Volcanic Field: Journal of Geophysical Research, v. 96, no. B8, p. 13,225-13,235.

Boettcher, A.L., O'Neil, J.R., Windom, K.E., Stewart, D.C., and Wilshire, H.G., 1979, Metasomatism of the upper mantle and the genesis of kimberlites and alkali basalts, in Boyd, F.R., and Meyer, H.O.A., eds., The mantle sample: Inclusions in kimberlites and other volcanics - Proceedings of the Second International Kimberlite Conference, Volume 2: American Geophysical Union, p. 173-182.

Ehrenberg, S.N., 1979, Garnetiferous ultramafic inclusions in minette from the Navajo Volcanic Field, in Boyd, F.R., and Meyer, H.O.A., eds., The mantle sample: Inclusions in kimberlites and other volcanics - Proceedings of the Second International Kimberlite Conference, Volume 2: American Geophysical Union, p. 330-344.

Kempton, P.D., Harmon, R.S., Hawkesworth, C.J., and Moorbath, S., 1990, Petrology and geochemistry of lower crustal granulites from the Geronimo Volcanic Field, southeastern Arizona: Geochimica et Cosmochimica Acta, v. 54, no. 12, p. 3,401-3,426.

Galer, S.J.G., and O'Nions, R.K., 1989, Chemical and isotopic studies of ultramafic inclusions from the San Carlos Volcanic Field, Arizona: A bearing on their petrogenesis: Journal of Petrology, v. 30, part 4, p. 1033-1064.

White, J.D.L., 1991, Maar-diatreme phreatomagmatism at Hopi Buttes, Navajo Nation (Arizona), U.S.A.: Bulletin of Volcanology, v. 53, no. 4, p. 239-258.

Goodwin, E.B., and McCarthy, J., 1990, Composition of the lower crust in west central Arizona from three-component seismic data: Journal of Geophysical Research, v. 95, no. B12, p. 20,097-20,109.

Wilshire, H.G., 1990, Lithology and evolution of the crust-mantle boundary region in the southwestern Basin and Range Province: Journal of Geophysical Research, v. 95, no. B1, p. 649-665.

Proctor, P.D., Fleck, K.S., and Shahin, A.N., 1993, Radiometric and petrochemical characteristics of the Dells Granite, Yavapai County, in Spencer, J.E., ed., Radon in Arizona: Arizona Geological Survey Bulletin 199, p. 61-81.

Kempton, P.D., and Dungan, M.A., 1989, Geology and petrology of basalts and included mafic, ultramafic, and granulitic xenoliths of the Geronimo Volcanic Field, southeastern Arizona, in Pallister, J.S., comp., Excursion 7A: From silicic calderas to mantle nodules: Cretaceous to Quaternary volcanism, southern Basin and Range province, Arizona and New Mexico, in Chapin, C.E., and Zidek, J., eds., Field excursions to volcanic terranes in the western United States, Volume I: Southern Rocky Mountain region, IAVCEI General Assembly, Santa Fe, New Mexico, USA, June 25 - July 1, 1989: New Mexico Bu