- Usage in publication:
-
- Coburn Hill volcanic member*
- Modifications:
-
- Named
- Dominant lithology:
-
- Volcanics
- Greenstone
- Amphibolite
- Slate
- Graywacke
- Conglomerate
- AAPG geologic province:
-
- New England province
Summary:
Named as a member of Moretown formation. Named for Coburn Hill in town of Newport, northern VT. Consists of massive light-green, greenish-gray-weathering fine-grained actinolite-chlorite-albite-epidote greenstone and massive, dense, very dark-green, drab-weathering, fine-grained hornblende-albite-epidote amphibolite with relict ophitic to diabasic texture. Interbedded with slate, graywacke, and fine conglomerate strata. Pillow structure in greenstone and amphibolite described at several localities. Unit is intergradational within upper part of Moretown formation. Age is Middle Ordovician.
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 ([ ]).