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National Geologic Map Database

Geologic Unit: Myerstown

Usage:

Myerstown Formation (PA*)
Myerstown Limestone (PA*)


Geologic age:

Middle Ordovician*


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

Roadcut in Millardsville, Lebanon Co., PA. Typical section near covered bridge across Swatara Creek, Dauphin Co. Not well exposed in Lebanon Co. Origin of name not stated by authors, but probably named from Myerstown, Lebanon Co., PA (Gray and Prouty, 1954).


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 ([ ]).