- Usage in publication:
-
- Flattop schist*
- Modifications:
-
- Named
- Dominant lithology:
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- Schist
- AAPG geologic province:
-
- Piedmont-Blue Ridge province
Summary:
Name Flattop schist introduced in this report for black, dark blue, bluish-green, and greenish gray very fine grained schists on Flattop Mountain in Watauga Co., NC. Schists are composed of quartz, feldspar, and mica of secondary origin and weather to yellowish gray or greenish gray. Commonly marked by light-gray bands more feldspathic than rest of rock, made up of quartz and feldspar grains of varying sizes with a little fine muscovite. Other portions of the schist contain porphyritic crystals of feldspar and amygdules, which show its volcanic nature. Grades into older Montezuma schist. Age given as Precambrian (Algonkian?).
Source: GNU records (USGS DDS-6; Reston GNULEX).
- Usage in publication:
-
- Flattop schist
- Modifications:
-
- Overview
- AAPG geologic province:
-
- Piedmont-Blue Ridge province
Summary:
Name Flattop schist used on State map. Unit occurs in association with Linville metadiabase, Montezuma schist, and unnamed metarhyolite.
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 ([ ]).