Usage:
St. Marys Formation of Chesapeake Group (MD*,VA*,DE*)
St. Marys Formation (NC)
Subunits:
Conoy Member (MD*,VA*), and, not included in this lexicon, informal Little Cove Point and Windmill Point members (MD,VA).
Geologic age:
late Tertiary (Miocene)*
Type section, locality, area and/or origin of name:
Type area: Along St. Marys River, St. Marys Co., MD (Shattuck, 1902).
AAPG geologic province:
Atlantic Coast 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 conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).