- Usage in publication:
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- Carlim 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 Carlim limestone for Carlim, Blair Co., central PA. Consists of dark, fine-grained limestone that is quarried extensively for flux. Includes the Lemont limestone member at top. Thickness is 180 feet. Overlies Bellefonte dolomite of Beekmantown group and underlies Lowville limestone. Correlates with Crown Point limestone in NY. The Carlim is of Middle Ordovician (Chazyan) age.
Source: GNU records (USGS DDS-6; Reston GNULEX).
- Usage in publication:
-
- Carlim limestone*
- Modifications:
-
- Overview
- AAPG geologic province:
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- Appalachian basin
Summary:
The Carlim limestone is 100 to 200 feet thick in Blair Co. where it is divided into a lower unnamed member and the Lemont limestone member. Unconformably overlies the Bellefonte dolomite and unconformably underlies the Lowville limestone.
Source: GNU records (USGS DDS-6; Reston GNULEX).
- Usage in publication:
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- Carlim
- Modifications:
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- Not used
- AAPG geologic province:
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- Appalachian basin
Summary:
Published fossil lists of Butts' collections from his Carlim limestone indicate that the unit is not Chazyan. In view of confusion, it seems best to drop the term Carlim in favor of Kay's terms Loysburg and Hatter.
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 ([ ]).