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Petrogenesis Of The Greenwater Range: Comparison To The Crater Flat Volcanic Field And Implications For Hazard Assessment, Ashley Kaye Tibbetts
Petrogenesis Of The Greenwater Range: Comparison To The Crater Flat Volcanic Field And Implications For Hazard Assessment, Ashley Kaye Tibbetts
UNLV Theses, Dissertations, Professional Papers, and Capstones
Pliocene basalts of the Greenwater Range, California erupted from 24 volcanic vents now represented by volcanic plugs, craters and scoria mounds. Basaltic magmas originated in the asthenospheric mantle, but show evidence of a lithospheric component. Depths and temperatures of melting calculated using a silica activity geobarometer are 54.3–89.6 km and 1367-1435oC, placing melting in the asthenosphere. The preferred petrogenetic model involves melting of lithospheric mantle thermally and mechanically, but not chemically, converted to asthenospheric mantle. Melting depths correspond to low velocity zones in the mantle as revealed in seismic profiles. Chemical and lithologic similarities between basalt in the Greenwater Range …
Weapons Labs And City Growth: Livermore And Albuquerque, 1945-1975, Layne Rochelle Karafantis
Weapons Labs And City Growth: Livermore And Albuquerque, 1945-1975, Layne Rochelle Karafantis
UNLV Theses, Dissertations, Professional Papers, and Capstones
This thesis traces the transformation of two cities in the American West: Albuquerque, a medium-sized metropolitan area in the generally low-population state of New Mexico, and Livermore, California, a relatively small town on the fringe of the massive San Francisco Bay Area metropolis. The federal government built nuclear weapons labs in both places after World War II, and as a result, they encountered phenomenal growth. This is not surprising, as authors such as Peter Hall and Ann Markusen have argued that federal installations in the postwar years affected the economies of many western cities. However, this thesis asserts that rural …