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National Geologic Map Database

Geologic Unit: Cockeysville

Usage:

Cockeysville Marble (MD)
Cockeysville Marble of Glenarm Group (DE*,MD*,PA*)
Cockeysville Marble of Glenarm Supergroup (DE,MD,PA)


Geologic age:

Precambrian
Proterozoic, Late
Cambrian*
Ordovician(?)*


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

Not designated. Named from exposures at Cockeysville, Baltimore Co., MD (Williams and Darton, 1892).
Reference section: outcrop in Eastburn's quarry, south of the intersection of Route 72 and Upper Pike Creek Road in Pleasant Hill Valley, Lat. 39 deg. 44 min. 25 sec. N., Long. 75 deg. 43 min. 03 sec. W., Newark East 7.5-min quadrangle, New Castle Co., DE (Plank and others, 2000).


AAPG geologic province:

Piedmont-Blue Ridge province*


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 ([ ]).