U.S. Geological Survey Home AASG Logo USGS HOME CONTACT USGS SEARCH USGS
National Geologic Map Database
Map showing publication footprint
  • Usage in publication:
    • Gassetts schist
  • Modifications:
    • Original reference
  • Dominant lithology:
    • Schist
  • AAPG geologic province:
    • New England province
Publication:

Richardson, C.H., 1929, The geology and petrography of Reading, Cavendish, Baltimore, and Chester, Vermont, IN Perkins, G.H., Report of the State Geologist on the mineral industries and geology of Vermont, 1927-1928: Vermont Geological Survey [Report of the State Geologist], 16th, p. 208-246.


Summary:

Pg. 210, 225. Gassetts schist. Silvery white, highly garnetiferous, muscovite schist; scaly texture, or muscovite is arranged in parallel plates and is by far the most abundant constituent. Is a highly metamorphosed sediment, which in certain outcrops has been affected by intrusives bearing boron and fluorine. Is a new and the oldest member of Upper Cambrian Missisquoi group. Underlies the typical sericite schists and quartzites of that group, of which it is the lower member. Overlies Bethel and Cavendish schists. Outcrops at Gassetts [Ludlow quadrangle] in northern part of Chester [Township], and at other places [mentioned] in Reading, Cavendish, Baltimore, and Chester Twps., Windsor County, southeastern Vermont. Assigned to Upper Cambrian.
[See also C.H. Richardson, 1931 (17th Rpt. Vermont State Geol., p. 198, 223). Also 18th Rpt. Vermont State Geol., where Richardson and J.E. Maynard state type locality is just north of Gassetts RR station.]

Source: US geologic names lexicon (USGS Bull. 896, p. 806).


Map showing publication footprint
  • Usage in publication:
    • Gassetts Schist Member
  • Modifications:
    • Revised
  • AAPG geologic province:
    • New England province
Publication:

Norton, S.A., 1969, Unconformities at the northern end of the Berkshire Highlands; Trip 21, IN Bird, J.M., ed., Guidebook for field trips in New York, Massachusetts, and Vermont: New England Intercollegiate Geological Conference Guidebook, 61st annual meeting, Albany, NY, p. 21.1-21.20.


Summary:

Revised the Gassetts to the Gassetts Schist Member of the Cavendish Formation in central VT. Unit is of early Paleozoic age.

Source: GNU records (USGS DDS-6; Reston GNULEX).


Map showing publication footprint
  • Usage in publication:
    • Gassetts Schist Member*
  • Modifications:
    • Age modified
  • AAPG geologic province:
    • New England province
Publication:

Ratcliffe, N.M., 2000, Bedrock geologic map of the Cavendish quadrangle, Windsor County, Vermont: U.S. Geological Survey Geologic Quadrangle Map, GQ- 1773, 1 sheet, 19 p., scale 1:24,000 [Available online from the USGS PubsWarehouse: http://pubs.er.usgs.gov/pubs/gq/gq1773]


Summary:

The Gassetts Schist Member of the reinstated Cavendish Formation (Mount Holly Complex) consists of yellowish-green to gray-green rusty weathering, lustrous, large-garnet, chlorite-biotite-muscovite-quartz-plagioclase schist. Because the Cavendish Formation is correlated with the Wilcox Formation of Middle Proterozoic Mount Holly Complex, the age of the Gassetts is changed to Middle Proterozoic.

Source: GNU records (USGS DDS-6; Reston GNULEX).


Search archives

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 ([ ]).

Accessibility FOIA Privacy Policies and Notices

USA Gov U.S. Department of the Interior | U.S. Geological Survey
Supported by the National Cooperative Geologic Mapping Program
Page Contact Information: Personnel
Page Last Modified: Thu 04 Apr 2024 03:20:32 PM MDT