- Usage in publication:
-
- Pinewood Adamellite
- Modifications:
-
- Named
- Dominant lithology:
-
- Quartz monzonite
- AAPG geologic province:
-
- New England province
Summary:
Pinewood Adamellite named in Fairfield Co., southwestern CT. Pluton consists of adamellite with muscovite books. Weathers gray. Surrounded by Straits Schist. Age is Permian(?).
Source: GNU records (USGS DDS-6; Reston GNULEX).
- Usage in publication:
-
- Pinewood Adamellite
- Modifications:
-
- Age modified
- Geochronologic dating
- AAPG geologic province:
-
- New England province
Summary:
Pinewood is described as a coarse-grained, garnet-bearing, two-mica granite that crops out as a small circular pluton at the northwest margin of the study area. Timing of the Alleghenian Orogeny in southwestern CT is constrained by the Pinewood Adamellite, which has 207Pb/235U ages ranging from 287 to 295 Ma. The monazites provide a crystallization age of 291+/-4 Ma. [Age straddles the Pennsylvanian-Permian boundary.]
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 ([ ]).