GEOLEX

Summary of Citation: Cheshire

Publication:
Emerson, B.K., 1917, Geology of Massachusetts and Rhode Island:
   U.S. Geological Survey Bulletin, 597, 289 p.

Usage in Publication:
Cheshire quartzite*

Modifications:	Geologic Province:	Dominant Lithology:
Named	New England province	Quartzite

Summary:
Probably named for typical exposures at or near Cheshire, Berkshire Co., western MA. Consists of colorless or slightly iron tinted, fine and evenly grained, granular quartz rock of very massive habit. Very feldspathic in places. Grades into underlying Dalton formation; overlain by Stockbridge limestone. Shown as Lower Cambrian on map correlation chart.

Summary of Citation: Cheshire

Publication:
Herz, Norman, 1958, Bedrock geology of the Cheshire quadrangle,
   Massachusetts: U.S. Geological Survey Geologic Quadrangle
   Map, GQ-108, 1 sheet, scale 1:31,680

Usage in Publication:
Cheshire quartzite*

Modifications:	Geologic Province:	Dominant Lithology:
Overview	New England province

Summary:
Cheshire quartzite described as fine- to medium-grained, massive white quartzite grading downward into fissile muscovite quartzite; contains friable kaolinitized quartzite at its top. Crops out as a band around Hinsdale gneiss and Dalton formation on North Mountain. Underlies highest hills in southeast part of quad, including The Cobbles in town of Cheshire. Lower contact is gradational with Dalton; upper contact is marked by kaolinitized quartzite.

Summary of Citation: Cheshire

Publication:
Knopf, E.B., 1962, Stratigraphy and structure of the Stissing
   Mountain area, Dutchess County, New York: Stanford University
   Publications, Geological Sciences, v. 7, no. 1, 55 p.

Usage in Publication:
Cheshire Quartzite*

Modifications:	Geologic Province:	Dominant Lithology:
Areal limits	New England province

Summary:
The correlation between the quartzite at Stissing Mountain, Dutchess Co., NY and quartzite at Poughquag [the Poughquag Quartzite] is much better supported than the correlation between quartzite at Stissing Mountain and quartzite of western MA [Cheshire Quartzite]. Therefore, the name Poughquag Quartzite is preferred rather than Cheshire Quartzite in eastern NY.

Summary of Citation: Cheshire

Publication:
Ratcliffe, N.M. and Harwood, D.S., 1975, Blastomylonites associated
   with recumbent folds and overthrusts at the western edge of
   the Berkshire massif, Connecticut and Massachusetts; a
   preliminary report, IN Tectonic studies of the Berkshire
   Massif, western Massachusetts, Connecticut, and Vermont: U.S.
   Geological Survey Professional Paper, 888-A, p. A1-A19

Usage in Publication:
Cheshire Quartzite*

Modifications:	Geologic Province:	Dominant Lithology:
Areal limits	New England province

Summary:
Rocks mapped as Cheshire Quartzite and Dalton Formation, undivided, are shown in figure 1 as present in CT, thus extending the Cheshire from MA to CT. [There seems to be some confusion as to the presence of Cheshire in CT. Harwood (1979) subsequently mapped in the same area in the South Sandisfield 7.5-min quad and shows no Cheshire in CT. Although Ratcliffe mapped the Ashley Falls quad to the immediate west, the map was never published and it may have shown Cheshire in CT. The only proof of Cheshire in CT found as of this date is on the overlapping parts of the Bedrock Geologic Map of Massachusetts by Zen and others (1983), and a very small part of Cheshire near the State border on the Bedrock Geologic Map of Connecticut by Rodgers (1985). No large-scale maps show Cheshire in CT.]

Summary of Citation: Cheshire

Publication:
Zen, E-an (editor), Goldsmith, Richard (compiler), Ratcliffe,
   N.M. (compiler), Robinson, Peter (compiler), Stanley, R.S.
   (compiler), Hatch, N.L., Jr., Shride, A.F., Weed, E.G.A. and
   Wones, D.R., 1983, Bedrock geologic map of Massachusetts:
   U.S. Geological Survey Special Map, 3 sheets, scale
   1:125,000

Usage in Publication:
Cheshire Quartzite*

Modifications:	Geologic Province:	Dominant Lithology:
Overview	New England province

Summary:
Used as Cheshire Quartzite of Early Cambrian age. Consists of white, massive, vitreous quartzite. Small part shown in adjacent area of northern CT on this map. [See Remarks for Ratcliffe and Harwood (1975), author_key=Ratcli1975a.]

Summary of Citation: Cheshire

Publication:
Thompson, J.B., Jr., 1990, An introduction to the geology and
   Paleozoic history of the Glens Falls 1 degrees x 2 degrees
   quadrangle, New York, Vermont, and New Hampshire, IN Slack,
   J.F., ed., Summary results of the Glens Falls CUSMAP project,
   New York, Vermont, and New Hampshire: U.S. Geological Survey
   Bulletin, 1887-A, p. A1-A13

Usage in Publication:
Cheshire Quartzite*

Modifications:	Geologic Province:	Dominant Lithology:
Areal limits	New England province

Summary:
Stratigraphic succession in Middlebury synclinorium in north-central part of Glens Falls quad consists of (ascending) Late Proterozoic Dalton Formation and Pinnacle Formation, Lower Cambrian Cheshire Quartzite, Lower and Middle Cambrian dolomites (Rutland Dolomite, Dunham Dolomite as used by Cady (1945), Winooski Dolomite) with minor quartzite (Monkton Formation), and Upper Cambrian Danby Formation. Middlebury synclinorium is considered a parautochthonous shelf sequence.

Summary of Citation: Cheshire

Publication:
Condon, R.K., 1993, South Mountain structure and stratigraphy,
   Bristol, Vermont [abs.]: The Green Mountain Geologist, v.
   20, no. 1, p. 6

Usage in Publication:
Cheshire Quartzite

Modifications:	Geologic Province:	Dominant Lithology:
Overview	New England province

Summary:
Mapping in Bristol Notch and along the Green Mountain front indicate that the Cheshire Quartzite appears to be at least 2500 ft thick, which is about 2.5 times the original estimated thickness to the north and south. Near the base, the Cheshire is a massive argillaceous feldspathic meta-sandstone, containing recrystallized quartz and K-feldspar in a muscovite and biotite matrix. These lithologies grade upward through medium to thick-bedded schistose feldspathic meta-sandstones to clean, massive 'quartzites' of the Green Mountain front. Rocks currently mapped as the eastern-most Cheshire Quartzite probably belong to the Pinnacle Formation and are in fault contact with the Cheshire.