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Geologic Unit: Stockbridge

Publication:
Emmons, Ebenezer, 1842, Geology of New York; Part II, Survey of 
   the second geological district: New York State Museum, 437 
   p.
Usage in Publication:
Stockbridge limestone

Modifications: Geologic Province: Dominant Lithology:
 Named
 New England province
 Limestone
 Marble

Summary:
Named for quarries near Stockbridge and Old West Stockbridge, western MA. Consists of white, clouded, and variously colored, coarse, granular limestone. Known commercially as Stockbridge marble and used as building stone. Assigned as the second bed of limestone in the Taconic system. Separated from the underlying first bed of limestone by magnesian slate and from overlying third bed by granular quartz rock.
Source: GNU records (USGS DDS-6; Reston GNULEX).


Publication:
Dana, J.D., 1872, Green Mountain geology; on the quartzite: 
   American Journal of Science, 3rd series, v. 3, p. 179-186, 
   250-256.
Usage in Publication:
Stockbridge limestone

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

Summary:
Stockbridge limestone of the Green Mountain is same as the Eolian of VT and extends southward and somewhat westward through Salisbury, CT, and Dover and Pawling, Dutchess Co., NY. It continues for 7 or 8 mi south of Pawling. [Casually called Pawling limestone or Poughquag limestone in report.] Age stated a Early Silurian (Calciferous to Trenton, possibly Chazy).
Source: GNU records (USGS DDS-6; Reston GNULEX).


Publication:
Rodgers, John, Gates, R.M., and Rosenfeld, J.L., 1956, Preliminary 
   geological map of Connecticut: Connecticut Geological and 
   Natural History Survey, Also, "Explanatory text for preliminary 
   geological map of Connecticut, 1956," Connecticut Geological 
   and Natural History Survey Bulletin, no. 84, 64 p., 1959.
Usage in Publication:
Stockbridge marble

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

Summary:
Referred to as Stockbridge marble in CT.
Source: GNU records (USGS DDS-6; Reston GNULEX).


Publication:
Clarke, J.W., 1958, The bedrock geology of the Danbury quadrangle: 
   Connecticut Geological and Natural History Survey Quadrangle 
   Report, no. 7, 47 p.
Usage in Publication:
Stockbridge limestone

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

Summary:
Inwood marble used instead of Stockbridge limestone in this area. Revises usage on 1906 State Geological Map of Connecticut.
Source: GNU records (USGS DDS-6; Reston GNULEX).


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:
Stockbridge group*

Modifications: Geologic Province: Dominant Lithology:
 Revised
 Age modified
 New England province
 

Summary:
Stockbridge in MA is equivalent to at least seven formations found in west-central VT: Dunham dolomite, Monkton quartzite, Winooski dolomite, Danby formation, Clarendon Springs dolomite, Canadian limestone, and unnamed marble. These formations range in age from Early Cambrian to Early Ordovician. In this quadrangle, the Stockbridge group includes (ascending): Kitchen Brook dolomite (new), Danby(?) Formation and equivalents, Clarendon Springs dolomite, Shelburne marble, and Bascom formation.
Source: GNU records (USGS DDS-6; Reston GNULEX).


Publication:
Zen, E-an, 1966, Stockbridge Formation, IN Cohee, G.V., and 
   West, W.S., eds., Changes in stratigraphic nomenclature by 
   the U.S. Geological Survey, 1965: U.S. Geological Survey 
   Bulletin, 1244-A, p. A30.
Usage in Publication:
Stockbridge Formation*

Modifications: Geologic Province: Dominant Lithology:
 Revised
 Age modified
 New England province
 

Summary:
Revised as Stockbridge Formation, a heterogeneous rock group that may be mapped as seven lithostratigraphic units A through G (ascending). Highest bed as mapped by Dale (1923) is interbedded with overlying schist and is reassigned to Walloomsac Formation. Units A, B, and C are mostly dolostone and include important beds of arkose and phyllite. Units D and F are heterogeneous rocks consisting of silty limestone, dolostone, calcite marble, phyllite, and calcareous sandstone. Sandstone shows cross-stratification that allows determination of the top of bedding. Units E and G are massive, white to gray calcite marble that include interbedded pale, massive, fine-grained dolostone. Because of this heterogeneity, the name is revised to Stockbridge Formation. Excellent exposures may be seen at Vossburg Hill and on hillside south of South Egremont village in Egremont quad, MA and NY. Yields no fossils but overlies Cheshire Quartzite of Early Cambrian age and underlies Middle Ordovician Walloomsac Formation; therefore, the Stockbridge spans the age between Early Cambrian and Early or Middle Ordovician.
Source: GNU records (USGS DDS-6; Reston GNULEX).


Publication:
Johnsen, J.H., and Schaffel, Simon, 1967, The economic geology 
   of the mid-Hudson Valley region; Trip B, IN Waines, R.H., 
   ed., Guidebook to field trips: New York State Geological 
   Association Guidebook, 39th Annual Meeting, Newburgh, NY, 
   May 5-7, 1967, no. 39, p. B1-B18. [Available online from the 
   New York Geological Association:  http://www.nysgaonline.org/
   newpage2.htm]
Usage in Publication:
Stockbridge Group

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

Summary:
In southeast NY, includes Balmville, Copake, Rochdale, Halcyon Lake, Briarcliff, and Pine Plains Formations.
Source: GNU records (USGS DDS-6; Reston GNULEX).


Publication:
Zen, E-an, 1967, Time and space relationships of the Taconic 
   allochthon: Geological Society of America Special Paper, 97, 
   107 p.
Usage in Publication:
Stockbridge Group*

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

Summary:
On plate 2, Stockbridge Group in southwest MA and northwest CT is subdivided into units A through G as used by Zen (1966). In northwest MA subdivided into Kitchen Brook Dolostone, Danby(?) Formation equivalents, Clarendon Springs Dolostone, Shelburne Marble, and Bascom Formation as used by Herz (1961) in the Cheshire, MA, quad.
Source: GNU records (USGS DDS-6; Reston GNULEX).


Publication:
Ratcliffe, N.M., 1974, Bedrock geologic map of the State Line 
   quadrangle, Columbia County, New York, and Berkshire County, 
   Massachusetts: U.S. Geological Survey Geologic Quadrangle 
   Map, GQ-1142, 1 sheet, scale 1:24,000 [http://ngmdb.usgs.gov/
   Prodesc/proddesc_10682.htm]
Usage in Publication:
Stockbridge Formation*

Modifications: Geologic Province: Dominant Lithology:
 Age modified
 New England province
 

Summary:
Age changed to Early Cambrian to Early Ordovician. Subdivided into units A to G following usage of Zen (1966).
Source: GNU records (USGS DDS-6; Reston GNULEX).


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:
Stockbridge Formation*

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

Summary:
Used as Stockbridge Formation of Early Cambrian to Early Ordovician age. Divided into three informal Cambrian units and four informal Lower Ordovician units.
Source: GNU records (USGS DDS-6; Reston GNULEX).


Publication:
Ratcliffe, N.M., Potter, D.B., and Stanley, R.S., 1993, Bedrock 
   geologic map of the Williamstown and North Adams quadrangles, 
   Massachusetts and Vermont, and part of the Cheshire quadrangle, 
   Massachusetts: U.S. Geological Survey Miscellaneous Investigations 
   Series Map, I-2369, 13 p., 2 sheets, scale 1:24,000
Usage in Publication:
Stockbridge Formation*

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

Summary:
Divided into units A through G following the usage of Zen (1966). Unit B is further divided into four dolostone subunits.
Source: GNU records (USGS DDS-6; Reston GNULEX).