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NGMDB
Geologic Unit: Antelope Valley
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Map showing publication footprint
  • Usage in publication:
    • Antelope Valley limestone*
  • Modifications:
    • Original reference
  • Dominant lithology:
    • Limestone
  • AAPG geologic province:
    • Great Basin province
Publication: Summary:

Pg. 28-29, pls. Antelope Valley limestone of Pogonip group. Named applied to uppermost formation in Pogonip Group. Dominantly thick-bedded or massive, medium-gray or light-bluish gray, fine-grained limestone. Very little chert present. Cliff-forming units not uncommon. Locally contains thinner bedded zones, as at base of formation on Martins Ridge, where there is about 150 feet of rather thinly bedded argillaceous limestone. Here, formation not separable from underlying Ninemile formation (new) on basis of change from thinner bedded to thicker bedded limestone, but color change in thin-bedded rocks is distinctive. Thinner bedded limestones present near top of formation both in Antelope Valley and at Eureka. In this part of section, limestone tends to be flaggy or platy with tan argillaceous partings and mottlings, although limestone still retains medium-gray to light-blulsh-gray color in bulk of unit. Thickness about 400 feet near Eureka; about 1,100 feet at Martins Ridge. In type area, underlies Copenhagen formation (new); in Eureka district proper, underlies Eureka quartzite. Fossils. Age is Middle Ordovician based on abundant fauna identified by C.W. Merriam.
Named from occurrence in Antelope Valley region, Eureka and Nye Cos., central NV. Well exposed on Martins [Martin] Ridge, in T. 15 N., R. 49 E., a linear northward-trending ridge that separates Copenhagen Canyon from Antelope Valley and is about [35 mi] southwest of Eureka, south Eureka Co., central NV.

Source: US geologic names lexicon (USGS Bull. 1200, p. 108-109); supplemental information from GNU records (USGS DDS-6; Menlo GNULEX).

NGMDB
Map showing publication footprint
  • Usage in publication:
    • Antelope Valley limestone*
  • Modifications:
    • Age modified
  • AAPG geologic province:
    • Great Basin province
Publication: Summary:

E. Kirk and G.A. Cooper (in Duncan, 1956) agreed that Chazy and therefore Antelope Valley limestone is late Early Ordovician rather than early Middle Ordovician.

Source: GNU records (USGS DDS-6; Menlo GNULEX).

NGMDB
Map showing publication footprint
  • Usage in publication:
    • Antelope Valley limestone*
  • Modifications:
    • Areal extent
  • AAPG geologic province:
    • Great Basin province
Publication: Summary:

Antelope Valley limestone geographically extended to Roberts Mountains area, NV.

Source: GNU records (USGS DDS-6; Menlo GNULEX).

NGMDB
Map showing publication footprint
  • Usage in publication:
    • Antelope Valley limestone*
  • Modifications:
    • Areal extent
  • AAPG geologic province:
    • Great Basin province
Publication: Summary:

In Toquima Range, overlies Stoneberger shale (new); underlies Caesar Canyon formation or Diana formation (both new).

Source: GNU records (USGS DDS-6; Menlo GNULEX).

NGMDB
Map showing publication footprint
  • Usage in publication:
    • Antelope Valley Limestone*
  • Modifications:
    • Revised
  • AAPG geologic province:
    • Great Basin province
Publication: Summary:

Antelope Valley limestone subdivided into three newly-named members in report area, (ascending); Paiute Ridge, Ranger Mountains, and Aysees members. Age is Early and Middle Ordovician.

Source: GNU records (USGS DDS-6; Menlo GNULEX).

NGMDB
Map showing publication footprint
  • Usage in publication:
    • Antelope Valley Limestone*
  • Modifications:
    • Age modified
  • AAPG geologic province:
    • Great Basin province
Publication: Summary:

Age of Antelope Valley limestone changed from Middle Ordovician to Early and Middle Ordovician.

Source: GNU records (USGS DDS-6; Menlo GNULEX).

NGMDB
Map showing publication footprint
  • Usage in publication:
    • Antelope Valley Limestone*
  • Modifications:
    • Areal extent
  • AAPG geologic province:
    • Great Basin province
Publication: Summary:

Antelope Valley Limestone of Pogonip Group is extended into Quartz Spring area, north of Teakettle Junction, Dry Mountain quad, CA, where section shows distribution of rocks types and enclosed fossils.

Source: GNU records (USGS DDS-6; Menlo GNULEX).

NGMDB
Map showing publication footprint
  • Usage in publication:
    • Antelope Valley Limestone*
  • Modifications:
    • Areal extent
  • AAPG geologic province:
    • Great Basin province
Publication: Summary:

Antelope Valley Limestone geographically extended into Spring Mountains, southeast NV. Age given as Ordovician.

Source: GNU records (USGS DDS-6; Menlo GNULEX).

NGMDB
Map showing publication footprint
  • Usage in publication:
    • Antelope Valley Limestone*
  • Modifications:
    • Age modified
  • AAPG geologic province:
    • Great Basin province
Publication: Summary:

Ages of Antelope Valley Limestone and its members (ascending): Paiute Ridge, Ranger Mountains, and Aysees Members changed from Early and Middle Ordovician to Middle Ordovician based on studies of mudmounds with STROMATACTIS structures.

Source: GNU records (USGS DDS-6; Menlo GNULEX).

NGMDB
Map showing publication footprint
  • Usage in publication:
    • Antelope Valley Limestone*
  • Modifications:
    • Age modified
  • AAPG geologic province:
    • Great Basin province
Publication: Summary:

Age is Middle Ordovician in the north Toquima Range and is late Early Ordovician and Middle Ordovician in type area. Type locality should read: Martin Ridge, T15N, R49E, which separates Copenhagen Canyon on west from Antelope Valley on east, south Eureka Co, NV.

Source: GNU records (USGS DDS-6; Menlo GNULEX).

NGMDB
Map showing publication footprint
  • Usage in publication:
    • Antelope Valley Limestone*
  • Modifications:
    • Areal extent
  • AAPG geologic province:
    • Great Basin province
Publication: Summary:

Antelope Valley Limestone of Early and Middle Ordovician age recognized in Cockalorum Wash 15' quad, Eureka and Nye Cos., east central NV.

Source: GNU records (USGS DDS-6; Menlo GNULEX).

NGMDB
Map showing publication footprint
  • Usage in publication:
    • Antelope Valley Limestone*
  • Modifications:
    • Areal extent
  • AAPG geologic province:
    • Great Basin province
Publication: Summary:

Unit geographically extended into report area [southern Sheep Range, Fossil Ridge, and Castle Rock area, Clark Co, NV]. Age given as Middle Ordovician.

Source: GNU records (USGS DDS-6; Menlo GNULEX).

NGMDB
Map showing publication footprint
  • Usage in publication:
    • Antelope Valley Formation*
  • Modifications:
    • Areal extent
  • AAPG geologic province:
    • Great Basin province
Publication: Summary:

Unit geographically extended into report area [Bare Mountain, Bare Mountain 15' quad, Nye Co, NV]. Age given as Ordovician.

Source: GNU records (USGS DDS-6; Menlo GNULEX).

NGMDB
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For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.

Asterisk (*) indicates usage by the U.S. Geological Survey. Other usages by state geological surveys.

"No current usage" (†) implies that a name has been abandoned or has fallen into disuse. Former usage and, if known, replacement name given in parentheses ( ).

Slash (/) indicates name does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).

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