Golconda Terrane - Home Ranch subterrane - Limestone, basalt, chert, and volcaniclastic rocks

Limestone, basalt, chert, and volcaniclastic rocks. The Home Ranch subterrane of the Golconda terrane shares similar structural characteristics with the rest of the Golconda terrane, but it has more specific age and lithologic features. It is restricted to Mississippian age (generally Early) and consists of shallow-water fossiliferous limestone, black chert, basalt, and volcaniclastic rocks. Olistostromal debris flows of basalt and limestone, indicative of steep paleotopography, are a distinguishing characteristic (Jones, 1991a). The depositional setting for this subterrane can be interpreted as a seamount. It includes rocks in Elko County mapped as the Banner and Nelson Formations, at least parts of the Inskip Formation in the East Range in Pershing County, the Goughs Canyon Formation in the Osgood Mountains, similar rocks in the Hot Springs Range in Humboldt County, and likely includes Mississippian limestone in the San Antonio Mountains in northern Nye County. To what extent these rocks have a history distinct from other rocks of the Golconda terrane is unclear. They are present structurally in a position outboard or west of most other exposures of the Golconda terrane, and are separated in the northern part of the State from other exposures of the terrane by the Nolan belt.
State Nevada
Name Golconda Terrane - Home Ranch subterrane - Limestone, basalt, chert, and volcaniclastic rocks
Geologic age Mississippian
Lithologic constituents
Major
Sedimentary > Carbonate > Limestone (Bed)shallow-water fossiliferous limestone
Igneous > Volcanic > Mafic-volcanic > Basalt
Sedimentary > Chemical > Chert (Bed)black chert
Minor
Igneous > Volcanic (Volcaniclastic)
References
NGMDB product
Counties Elko - Humboldt - Nye - Pershing