Lovell Wash Member of Horse Spring Formation

Usage of Geologic Unit Name:
Lovell Wash Member* of Horse Spring Formation

Geologic Age:

Geologic Province:
Great Basin province*

Areal Extent:
Type Locality:
Type section: in Lovell Wash in Muddy Mountains, stratigraphically above Bitter Ridge Limestone Member of Horse Spring Formation at lat 36 deg 12' 45" N; long 114 deg 42' 30"W, Hoover Dam 15' quad, Clark Co, NV (Bohannon, 1984).
Unit Name History:
Named as the upper member (of four) of Horse Spring Formation in Lovell Wash (Bohannon, 1984). Isotopic dating (Bohannon, 1984).
Bohannon, R.G., 1984, Nonmarine sedimentary rocks of Tertiary age in the Lake Mead region, southeastern Nevada and northwestern Arizona: U.S. Geological Survey Professional Paper, 1259, 72 p., (incl. geologic map, scale approx. 1:790,000)

Beard, L.S., 1996, Paleogeography of the Horse Spring Formation in relation to the Lake Mead fault system, Virgin Mountains, Nevada and Arizona,in Reconstructing the History of Basin and Range Extension using sedimentology and stratigraphy, Beratan, K.K., ed., Geological Society of America Special Paper 303, p. 27-60.
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* shhorsespring_lovellwashow accepted USGS usage. Note that data on this page contains information that has been partly revised from bibliographic resources available via the
National Geologic Map Database GEOLEX:
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Last modified:8/10/2006