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National Geologic Map Database

Geologic Unit: Johns Creek

Usage:

Johns Creek Shale of Sonyea Group (NY)
Johns Creek Member of Middlesex Shale (NY)


Geologic age:

Late Devonian


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

Named from exposures about 900 ft below the Camas Prairie, at confluence of Johns Creek and Rock Creek, 1 mi northwest of Tolo Lake, central NY. Well exposed in adjoining canyons and traceable for many miles along Snake and Salmon Rivers (Bond, 1963).


AAPG geologic province:

Appalachian basin


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