Lower Paleozoic and Uppermost Precambrian Cordilleran Miogeocline, Great Basin, Western United States

Tectonics of southeastern Arizona

“…Again, if a similar magnitude of 1 moveme~t is assigned to the Hidalgo thrust fault as · is here argued for the Cochise thrust fault, then tectonic transport is on the order of 200 km. This distance is remarkably similar to those proposed, on different kinds of evidence, along the Cordilleran thrust belt in Alberta (200 km or more, Price and Mountjoy, 1970), Utah (160 km or more, Stewart and Poole, 1974;or 85 km, Rubey and Hubbert, 1959;Crittenden, 1961), andsouthernNevada(36-75kmor more, Burchfiel and others, 1974;or 30-50 km, Fleck, 1970;or about 120 km, Steward and Poole, 1974). Attractive as these comparisons are, my support for such a large distance of tectonic transport is based on imperfect evidence and on projections of movement from the Cochise to the Hidalgo thrust fault.…”

Strontium Isotopic Composition of Paleozoic Carbonate Rocks in the Nevada Test Site Vicinity, Clark, Lincoln, and Nye Counties, Nevada and Inyo County, California.

“…A generalized stratigraphic succession of the approximately 11,500-m-thick sequence of preTertiary rocks present on the NTS is shown in figure 2. The summary presented below is compiled from more detailed descriptions presented by Burchfiel (1964), Barnes and Christiansen (1967), Stewart and Poole (1974), Winograd and Thordarson (1975), Monsen and others (1992), Laczniak and others (1996), Trexler and others (1996;2003), Slate and others (1999), and Page and others (2005). Age estimates for stratigraphic units from the NTS and surrounding areas are listed in table 1.…”

“…The 5,200-m-thick section of Middle Cambrian through Devonian rocks is composed of marine limestones and dolomites with minor interbeds of sandy or silty clastic units (Barnes and Christiansen, 1967;Stewart and Poole, 1974;others, 1996, 2003;Slate and others, 1999). Aquifer tests indicate very high degrees of water transmissivity through these units due to extensive secondary permeability along a well-connected network of solutionenhanced fractures, faults, and breccias (Winograd and Thordarson, 1975, p. 117;Laczniak and others, 1996).…”

Geothermal resource assessment of the Yucca Mountain Area, Nye County, Nevada. Final report

“…Carr (1984) notes that these older sedimentary rocks include the Pahrump Group and Noonday Dolomite of Jennings (1977) that crop out south of the Yucca Mountain study area. More than 7 km of sedimentary rock accumulated in the vicinity of the Yucca Mountain area by the late Devonian (Stewart and Poole, 1974). In the late Devonian, the well-documented Antler Orogeny had formed along the western edge of the continent, shedding clastic detritus into a basin that formed over the former site of the carbonate bank (Poole, 1974). During this time, the Upper Devonian and Mississippian Eleana Formation, which consists of a combination of argillite, siliceous siltstone, and very fine-grained quartzite (quartzite-pebble conglomerate, and sparse limestone of Frizzell and Shulters, 1990), was deposited in the Antler foreland flysch basin.…”