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National Geologic Map Database

Geologic Unit: Andreas

Usage:

Andreas Red Beds (PA*)


Geologic age:

Late Silurian or Early Devonian*


Type section, locality, area and/or origin of name:

Type locality: quarry of William Loch 0.5 mi southeast of Andreas, on east side of small stream, and about 0.25 mi northeast of quarry of J. Rudolph, (Hamburg quadrangle) Schuylkill Co., PA. [Upper and lower boundary concealed.] Origin of name not stated by author, but probably named for the town of Andreas (Swartz and Swartz, 1941).
Reference section: in active quarry 3,700 ft due south of Andreas, PA (Epstein and Lyttle, 1993).


AAPG geologic province:

Appalachian basin*


For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.

Asterisk (*) indicates usage by the U.S. Geological Survey. Other usages by state geological surveys.

"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 does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).