- Usage in publication:
-
- Boscabel bowlder [sic] beds*
- Modifications:
-
- Named
- Dominant lithology:
-
- Conglomerate
- AAPG geologic province:
-
- Piedmont-Blue Ridge province
Summary:
Conglomerate deposits at two places along the western margin of the Richmond basin and near the base of the Newark section, are here named the Boscabel bowlder [sic] beds of the Tuckahoe Group. Unit consists of large angular blocks and fragments of gneiss and granite randomly oriented in a matrix of red gritty sandstone. These deposits are time equivalents to the lower barren beds on the eastern margin of the basin. Thickness is from 0 to 50 ft (0 to 15 m). Age is Late Triassic.
Source: GNU records (USGS DDS-6; Reston GNULEX).
- Usage in publication:
-
- Boscobel Formation
- Boscobel Granodiorite
- Boscobel Member
- Modifications:
-
- Revised
- AAPG geologic province:
-
- Richmond basin
- Piedmont-Blue Ridge province
Summary:
Nomenclature in this report follows Ediger and others (in prep). Richmond basin sequence is divided into three formations (ascending): Tuckahoe, Turkey Branch, and Otterdale Formations of Newark Supergroup. Contacts are unconformable. Boscobel, in this report, is referred to variously as Formation, Granodiorite, and Boulder Beds Member [of Tuckahoe Formation?]. Exposed to the west of Boscobel quarry, Midlothian quad, VA. . [Spelling of Boscobel varies from the original Boscabel.]
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 ([ ]).