USGS Visual Identifier
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Geologic Unit: Richland

Richland Formation of Conococheague Group (PA*)
Richland Member of Conococheague Formation (PA)

Cambrian, Late*
Geologic Province:
Appalachian basin*
Areal Extent:

Type Locality:
Along Reading RR, about 0.25 mile east of Richland and along road immediately west of Sheridan, Lebanon Co., PA (Gray and others, 1958).

Unit Name History:
Named (Gray and others, 1958).
Revised to Richland Formation (Gray and others, 1960).
Overview (Meisler and Becher, 1968).
Overview (Berg and others, 1980).

Note: If you need more information, please contact Nancy Stamm (
Asterisks (*) indicate usage by the U.S. Geological Survey. Other usages by state geological surveys.

"No current usage" implies that a name has been abandoned or that it has fallen into disuse. Former usage and, if known, replacement name given in parentheses ().

Slashes (/) indicate unit name usage violates the 1983 North American Stratigraphic Code. This violation may be explained within brackets ([ ]).

U.S. Department of the Interior, U.S. Geological Survey, Reston, VA, USA
Database project personnel
Last modified: 15-Jan-2013