- Usage in publication:
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- Chatham Hill formation
- Modifications:
-
- Named
- Dominant lithology:
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- Limestone
- AAPG geologic province:
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- Appalachian basin
Summary:
Named for Chatham Hill in Chatham Hill quad, southwestern VA [Name attributed to B.N. Cooper and G.A. Cooper]. Occurs in area for which Porterfield stage is named. Base is not generally well exposed and is transitional with underlying black, graptolitic shales of Rich Valley formation (new). Upper part is cherty, dark-bluish-gray limestone with top prominently defined by succeeding ledges of calcarenite forming lower part of Wassum formation (new). Total thickness about 450 ft. Age is Middle Ordovician.
Source: GNU records (USGS DDS-6; Reston GNULEX).
- Usage in publication:
-
- Chatham Hill Limestone*
- Modifications:
-
- Overview
- AAPG geologic province:
-
- Appalachian basin
Summary:
The Chatham Hill Limestone occurs in the subsurface of VA near the Pulaski thrust fault as shown in section F-F'.
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 ([ ]).