- Usage in publication:
-
- Kauffman member
- Modifications:
-
- Named
- Dominant lithology:
-
- Limestone
- Metabentonite
- AAPG geologic province:
-
- Appalachian basin
Summary:
Named the Kauffman member of the Mercersburg formation for village of Kauffman, Franklin Co., south-central PA. Unit is upper member of formation. Consists of dark-gray, fine- to medium-grained, thin, crinkly to slabby, gray-weathering limestone. Thick slabby or thin cobbly beds developed locally in eastern belts of outcrop; usually platy bedded in western belts. Four metabentonites present at type locality; each is immediately succeeded by several feet of olive-drab to green shale or blocky siltstone. Maximum thickness is 168 feet; thins to northeast. Conformably overlies the Housum member of the Mercersburg and disconformably underlies the Oranda formation. The Kauffman is of Middle Ordovician age.
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 ([ ]).