- Usage in publication:
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- Delaware limestone
- Modifications:
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- Named
- Dominant lithology:
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- Limestone
- AAPG geologic province:
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- Appalachian basin
Summary:
Named the Delaware limestone for Delaware, Delaware Co., OH. Unit is part of the Upper Corniferous limestone. Consists of 35 feet of blue, even-bedded, argillaceous limestone. Unit overlies the Delhi limestone of the Lower Corniferous. The Delaware is of Middle Devonian age.
Source: GNU records (USGS DDS-6; Reston GNULEX).
- Usage in publication:
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- Delaware Limestone*
- Modifications:
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- Overview
- AAPG geologic province:
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- Appalachian basin
Summary:
The Delaware Limestone in northern OH is largely equivalent to the Seneca Member of the Onondaga Limestone of New York. Unit overlies the Columbus Limestone; the contact between the two units is the Tioga Bentonite Bed. Examination of core sections in the Lake Shore area indicates that the Columbus-Delaware contact descends to the east.
Source: GNU records (USGS DDS-6; Reston GNULEX).
- Usage in publication:
-
- Delaware Limestone
- Modifications:
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- Areal extent
- AAPG geologic province:
-
- Appalachian basin
Summary:
The Delaware Limestone is identified in the subsurface of northwestern PA. Unit overlies the Columbus Limestone and underlies the Marcellus Shale. The Delaware Limestone along with the Columbus Limestone correlates eastward with the Onondaga Group and southward with the Huntersville Chert and Needmore Shale.
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 ([ ]).