Usage:
Loch Raven Schist (MD*)
Loch Raven Formation (MD)
Subunits:
(alphabetical) --all in MD: Hydes Marble Member, Rush Brook Member.
Geologic age:
Neoproterozoic and/or Early Cambrian*
Type section, locality, area and/or origin of name:
Type locality: on banks of Loch Raven Reservoir from Papermill Road (Ashland Ave.), south for 1.5 km, Baltimore Co., northeastern MD (Crowley, 1976).
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 ([ ]).