Usage:
Narragansett Bay Group (MA*,RI*)
[Appears to be same as †Narragansett Basin series of early reports.]
Subunits:
(alphabetical): Dighton Conglomerate (MA*,RI*), Pondville Conglomerate (MA*,RI*), Purgatory Conglomerate (RI*), Rhode Island Formation (MA*,RI*), Sachuest Arkose (RI*), Wamsutta Formation (MA*,RI*).
Geologic age:
Pennsylvanian (Bashkirian to possibly Gzhelian; Westphalian A to possibly Stephanian C)*
Type section, locality, area and/or origin of name:
[Type area (as delineated by Hermes and others, compilers, 1994, Rhode Island Geol. Survey Map Ser., no. 1, scale 1:100,000): Narragansett Bay area, from approx. Lat. 41 deg. 30 min. to 42 deg. 00 min. N., and from approx. Long. 71 deg. 07 min. 30 sec. to 71 deg. 30 min. W., Providence 30- x 60-min quadrangle, Newport, Washington, and Bristol Cos., RI, and Bristol Co., MA.]
AAPG geologic province:
New England 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 ([ ]).