- Usage in publication:
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- St. Luke limestone member
- Modifications:
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- Named
- Dominant lithology:
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- Limestone
- AAPG geologic province:
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- Appalachian basin
Summary:
Named St. Luke member of the Edinburg formation for St. Luke, Shenandoah Co., VA. Unit is topmost division of the Edinburg in the Shenandoah Valley. Consists of rather pure, dove-gray limestone above the NIDULITES-LAMBEOPHYLLUM zone and below the REUSCHELLA "EDSONI" beds that characterize the basal Oranda formation. Thickness of the St. Luke member is 90 feet at the type locality. Unit is of Middle Ordovician age.
Source: GNU records (USGS DDS-6; Reston GNULEX).
- Usage in publication:
-
- St. Luke Member
- Modifications:
-
- Overview
- AAPG geologic province:
-
- Appalachian basin
Summary:
The St. Luke Member of the Edinburg Formation is a dove-gray, fine-grained limestone. It is the top member of the formation. This unit closely resembles the New Market Limestone, except for local coarse calcarenites and cross-bedded coquinites.
Source: GNU records (USGS DDS-6; Reston GNULEX).
- Usage in publication:
-
- St. Luke Member
- Modifications:
-
- Overview
- AAPG geologic province:
-
- Appalachian basin
Summary:
The St. Luke Member of the Edinburg Formation is a gray, medium- to coarse-grained limestone and dove-gray, micritic limestone. Small sinkholes are common in the St. Luke and are a distinctive marker where outcrops are sparse.
Source: GNU records (USGS DDS-6; Reston GNULEX).
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 ([ ]).