Usage:
Brandywine Blue Gneiss of Wilmington Complex (DE)
Geologic age:
Early Ordovician
Type section, locality, area and/or origin of name:
Type section: in large quarries along the northeast side of Brandywine Creek, adjacent to the Northern Delaware Greenway, Alapocas Woods Park, Lat. 39 deg. 46 min. 10 sec. N., Long. 75 deg. 33 min. 37 sec. W., Wilmington North 7.5-min quadrangle, New Castle Co., DE. Origin of name not stated by authors, but probably named from Brandywine Creek (Plank and others, 2000).
AAPG geologic province:
Atlantic Coast basin
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 ([ ]).