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Geologic Unit: Winooski

Publication:
Hitchcock, E., 1861, Report on the geology of Vermont; descriptive, 
   theoretical, economical, and scenographical: Claremont, NH, 
   Claremont Manufacturing Company, v. 1, 982 p.
Usage in Publication:
Winooski marble

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

Summary:
Named for the basal 40 ft of the Red Sandrock series. Probably named for exposures along Winooski River in town of Burlington, Chittendon Co., northwestern VT. Winooski is term used by economic geologists for this part of the Red Sandrock.
Source: GNU records (USGS DDS-6; Reston GNULEX).


Publication:
Keith, Arthur, 1923, Cambrian succession of northwestern Vermont: 
   American Journal of Science, 5th series, v. 5, no. 26, p. 
   97-139.
Usage in Publication:
Winooski marble*

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

Summary:
Winooski marble type locality given as along Winooski River in Burlington, VT, where it was quarried. Consists mainly of red or pink mottled dolomite. Contains interbeds of coarsely crystalline, light-gray dolomite. All dolomite is dense and has conchoidal fracture. Is very resistant to erosion and forms long ledges over hollows and slopes. Base of formation is interbedded with quartzite for about 50 ft, forming a transition to underlying Monkton quartzite (new). Top of formation is marked by red, buff, and purple quartzite layers exhibiting ripple marks, mudcracks, and annelid trails. Top is well exposed at Winooski Falls in Burlington. Although fossils found in this unit were assigned to the Silurian (by James Hall in 1847) and to the Potsdam (by Billings), Walcott (1883) found Lower Cambrian fossils in the pink dolomite.
Source: GNU records (USGS DDS-6; Reston GNULEX).


Publication:
Cady, W.M., 1945, Stratigraphy and structure of west-central 
   Vermont: Geological Society of America Bulletin, v. 56, no. 
   5, p. 515-587.
Usage in Publication:
Winooski dolomite

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

Summary:
Revised as Winooski dolomite. Unit is restricted to dolomite beds at Winooski Falls or Winooski village in Colchester Twp. Other localities near Mallet Bay, in vicinity of Ethan Allen Park in Burlington, and along the lower Winooski River are in a distinctly lower stratigraphic zone. Top of Winooski never identified but is placed beneath lowest bed of typical Upper Cambrian Danby quartzite. Bottom contact with Monkton quartzite also hard to identify but placed where quartzite beds are over 1 ft thick and are separated by less than 25 ft. Thickness ranges from 100 to at least 800 ft.
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:
Winooski Dolostone*

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

Summary:
Revised as Winooski Dolostone. Age changed from Early Cambrian to Early and Middle Cambrian. Shown on plate 2 as occurring in east limb of Middlebury syncline in southwest VT.
Source: GNU records (USGS DDS-6; Reston GNULEX).


Publication:
Dorsey, R.J., Agnew, P.C.., Carter, C.M., Rosencrantz, E.J., 
   and Stanley, R.S., 1982, Geology of the Milton quadrangle, 
   northwestern Vermont: Vermont Geological Survey Special 
   Bulletin, no. 3, 14 p., (incl. geologic maps, scale 1:24,000 
   and 1:62,500)
Usage in Publication:
Winooski Formation

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

Summary:
Revised as Winooski Formation in northwestern VT and assigned a Middle Cambrian age. [No explanation given for revisions to name or age.]
Source: GNU records (USGS DDS-6; Reston GNULEX).


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:
Winooski Dolomite*

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


Publication:
Burton, W.C., 1993, Bedrock geologic map of the Sunderland 
   quadrangle, Bennington and Windham Counties, Vermont: U.S. 
   Geological Survey Miscellaneous Field Studies Map, MF-2224, 
   1 sheet, scale 1:24,000
Usage in Publication:
Winooski Dolomite*

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

Summary:
Winooski Dolomite mapped in southwestern VT and given an Early Cambrian age. [Overall age for Winooski is Early and Middle Cambrian and may be time transgressive from south to north; see Dorsey and Stanley (1982) for northwestern VT.]
Source: GNU records (USGS DDS-6; Reston GNULEX).