- Usage in publication:
-
- Longwood red shales
- Modifications:
-
- Named
- Dominant lithology:
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- Shale
- AAPG geologic province:
-
- Piedmont-Blue Ridge province
- Appalachian basin
Summary:
Red beds, with green to buff layers in Longwood Valley, Morris Co., NJ, called Longwood red shales. Overlain by 12 ft. of light-colored thin-bedded quartzites. Thickness 150 ft. Underlie Waterlime member [Decker limestone] of Helderberg limestone [broad usage of Helderberg] and grade into underlying Green Pond conglomerate. Age is Silurian.
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 ([ ]).