- Usage in publication:
-
- Great Bridge Formation
- Modifications:
-
- Named
- Dominant lithology:
-
- Sand
- Clay
- AAPG geologic province:
-
- Atlantic Coast basin
Summary:
Great Bridge Formation is introduced in this report in Norfolk Co., southeastern VA. Unit consists of beach-ridge sand in east and lagoon clay in west. Maximum thickness reaches 55 ft. Overlies North Landing Formation (new name) and underlies Norfolk Formation. Age is middle or late Pleistocene.
Source: GNU records (USGS DDS-6; Reston GNULEX).
- Usage in publication:
-
- Great Bridge Member
- Modifications:
-
- Revised
- AAPG geologic province:
-
- Atlantic Coast basin
Summary:
Kempsville (top), Norfolk, and Great Bridge Formations reduced to Member rank and assigned to Acredale Formation, here named in the Virginia Beach area. Units represent single transgressive-regressive event, laterally and vertically intergrading lithofacies and biofacies of estuarine silty sands, continental shelf sands, and beach to fluvial sands. Age modified to late Pleistocene.
Source: GNU records (USGS DDS-6; Reston GNULEX).
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 ([ ]).