Preliminary geologic map of the Moores Station quadrangle, Nye County, Nevada

Well Completion Report for Corrective Action Unit 443 Central Nevada Test Area Nye County, Nevada

“…The Faultless test created a subsidence graben elongated to the northeast and parallel to numerous preexisting faults in the Quaternary valley-fill deposits (Figure 3-1). The graben is bounded by curved faults on the southeast, south, southwest, and northwest, with an apparent hinge line at the northeastern end of the graben (Ekren et al 1973). Maximum subsidence at the time of the test was 14.8 ft.…”

“…Collapse chimneys typically extend 4 to 6 cavity radii above the working point, whereas the Faultless test occurred at a depth estimated to be about 10 cavity radii below the surface (Glasstone and Dolan 1977). Analysis of post-shot seismic data indicates that minor strike-slip movement occurred along a buried north-striking fault in Moores Station Wash from 2 to 4 miles south of the Faultless test (Ekren et al 1973;McKeown and Dickey 1969).…”

Seismic Survey Report for Central Nevada Test Area, Subsurface, Correction Action Unit 443, Revision 1

“…Mountain ranges adjacent to the CNTA contain large volumes of extension-related Tertiary volcanic rocks overlying Paleozoic marine strata (Ekren et al 1973). The actively extending valleys (approximately 3 millimeters per year) contain basins filled with large volumes of alluvial and fluvial deposits shed from the adjacent ranges (Thatcher et al 1999).…”

Development and Testing of a Groundwater Management Model for the Faultless Underground Nuclear Test, Central Nevada Test Area

“…The Tertiary volcanics consist of tuffs, tuffaceous sediments, sandstones, basalts, and rhyolite lavas ranging in age from Oligocene to Pliocene (Ekren et al, 1973). The tuffs are generally fine grained and tightly welded, containing numerous fractures and normal, thrust, and strike-slip faults.…”

“…Paleozoic rocks exposed in the Hot Creek Range are Cambrian to Permian in age and are complexly folded and faulted. The Faultless site is within the Morey Peak-Hot Creek Caldera complex and the Pancake Range Calderas are to the south (Ekren et al, 1973).…”