- Usage in publication:
-
- Cinnamon Ridge member*
- Modifications:
-
- Named
- Dominant lithology:
-
- Basalt
- Agglomerate
- Breccia
- Rhyolite
- Granite
- Tuff
- AAPG geologic province:
-
- Piedmont-Blue Ridge province
Summary:
Named as member of Flat Ridge Formation. Named for Cinnamon Ridge, 1 mi west of Gossan Lead District, Grayson Co., southwestern VA. Consists of blue dense basalt, with veins of epidote and red jasper, a green amygdaloidal basalt with epidote-filled vesicles, and a tuff. These are underlain by an agglomerate and flow breccia containing angular blocks of purplish-blue flow-banded vesicular basalt, of red rhyolite, of red jasper, and of granite, in an epidotic groundmass. Thickness is about 90 ft. Beds thin out east of Wolfpen Branch. Lies near base of Flat Ridge Formation. Age is Precambrian.
Source: GNU records (USGS DDS-6; Reston GNULEX).
- Usage in publication:
-
- Cinnamon Ridge Memberâ€
- Modifications:
-
- Abandoned
- AAPG geologic province:
-
- Piedmont-Blue Ridge province
Summary:
Because Mount Rogers Volcanic Group is reduced in rank to Mount Rogers Formation, all formations and members of the Group are abandoned, including the Flat Ridge Formation and its Cinnamon Ridge Member.
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 ([ ]).