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Map showing publication footprint
  • Usage in publication:
    • Ridgely sandstone member
  • Modifications:
    • Named
  • Dominant lithology:
    • Sandstone
  • AAPG geologic province:
    • Appalachian basin
Publication:

Swartz, C.K., Rowe, R.B., Schuchert, Charles, and Maynard, T.P., 1913, Lower Devonian in Maryland; Local sections of the Lower Devonian [of Maryland]; Correlation of the Lower Devonian, IN Swartz, C.K., and others, Lower Devonian [deposits of Maryland]: Maryland Geological Survey Systematic Report, p. 23-66, 96-190.


Summary:

Name Ridgely sandstone member introduced for top member of Oriskany formation. Unit consists of calcareous sandstone, which passes into an arenaceous limestone. Thickness ranges from 50 to 250 ft. Closely resembles Oriskany of NY in lithology and fauna. Overlies Shriver chert member of Oriskany and unconformably underlies Romney formation, which contains Onondaga fauna in basal beds. Named for Ridgely, WV [later changed to Ridgeley].

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


Map showing publication footprint
  • Usage in publication:
    • Ridgeley sandstone*
  • Modifications:
    • Areal extent
  • AAPG geologic province:
    • Appalachian basin
Publication:

Swartz, F.M., 1929, The Helderberg group of parts of West Virginia and Virginia, IN Shorter contributions to general geology, 1929: U.S. Geological Survey Professional Paper, 158-C, p. C27-C75.


Summary:

Ridgeley sandstone is identified at Petersburg, WV; 4 mi west of Wardensville, WV; 3 mi south of Wardensville; near Franklin, WV; near Monterey, VA, near McDonald, VA; west of Warm Springs VA; east of Warm Springs; west of Hot Springs, VA; west of Healing Springs, VA; and near Gala, VA.

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


Map showing publication footprint
  • Usage in publication:
    • Ridgeley Sandstone
  • Modifications:
    • Areal extent
    • Overview
  • AAPG geologic province:
    • Appalachian basin
Publication:

Monteverde, D.H., 1992, Bedrock geologic map of the Sussex County, New Jersey, portions of the Culvers Gap and Lake Maskenozha quadrangles: New Jersey Geological Survey Geologic Map, 92-1, 1 sheet, scale 1:24,000


Summary:

Ridgeley Sandstone mapped as upper member of Oriskany Group in northwestern NJ. Unit described as medium-gray, medium- to thick-bedded quartz-pebble conglomerate and coarse quartz sandstone. Sand grains are moderately well sorted and subrounded. Rock has a carbonate cement and contains abundant brachiopods. Unit first occurs west of Peters Valley and thickens to the southwest. Thickness ranges from 0 to 32 ft. Overlies Shriver Chert of Oriskany Group; underlies Esopus Formation. Age is Early Devonian.

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


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

Asterisk (*) indicates published by U.S. Geological Survey authors.

"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 conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).

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