Usage:
/Baltimore Complex (MD*,PA*)
/Baltimore Mafic Complex (MD)
[Preoccupied. Name formally applied to Baltimore Gneiss by Williams and Darton (1892) in same area.]
Subunits:
(alphabetical) --all in MD: Bradshaw Layered Amphibolite, Hollofield Layered Ultramafite, Mount Washington Amphibolite, Raspeburg Amphibolite.
Geologic age:
Cambrian*
Type section, locality, area and/or origin of name:
[Type area: covers an area of about 50 sq. mi in Piedmont of Baltimore City, Baltimore Co., and Howard Co., eastern MD.]
AAPG geologic province:
Piedmont-Blue Ridge province*
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 conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).