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Grace Feldspar Mine, Newtown, Fairfield Co., Connecticut, USA

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Latitude & Longitude (WGS84): 41° 23' 59'' North , 73° 20' 30'' West
Latitude & Longitude (decimal): 41.39972,-73.34167
Köppen climate type:Cfa : Humid subtropical climate


Cruson (1991) gives the only known reference to this obscure locality:

In April of 1921, a veteran of the mine/quarry business named Captain Charles Cook from New Milford, leased the mineral rights of the FA Young farm in Taunton, on the corner of Castle Hill and Great Hill Roads. Here there were several large veins of pegmatite which ran from the northeast to south west across the farm and Cook appears to have worked these veins intensively for several months....

Within a year of opening this last quarry, Cook had exhausted the sites here to his satisfaction and had apparently moved on. Feldspar quarrying had not died out completely, however. In September 1924, William B Warner of Newbury, NY, had again leased the mineral rights to the Young farm. He opened up a new ledge of pegmatite Cook had overlooked, and struck an unusually fine grade of feldspar. He christened his quarry the Grace Feldspar Mine and at the time there was estimated to be a sufficient quantity of high grade rock to last from five to twelve years. It is uncertain how long this operation was carried on, but Warner was in town for at least another year...


Commodity List

This is a list of exploitable or exploited mineral commodities recorded at this locality.


Mineral List


3 valid minerals.

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org

Early Ordovician
470 - 485.4 Ma



ID: 2974850
Ratlum Mountain Schist

Age: Early Ordovician (470 - 485.4 Ma)

Stratigraphic Name: Ratlum Mountain Schist

Description: Gray, medium-grained, interlayered schist and granofels, composed of quartz, oligoclase, muscovite (in the schist), biotite, and garnet, also staurolite and kyanite in the schist. Numerous layers and lenses of amphibolite; also some of quartz-spessartine (coticule) and calc-silicate rock.

Comments: Part of Central Lowlands; Iapetus (Oceanic) Terrane - Connecticut Valley Synclinorium; Hartland Belt. Equivalents of Savoy Schist of Massachusetts (Emerson, 1898, 1917) (CT009, CT010) and of Moretown Formation of Vermont and Massachusetts (Bedrock Geologic Map of Massachusetts, Zen and others, 1983) (CT011) (includes Golden Hill and Ratlum Mountain Schists) (Lower? Ordovician).

Lithology: Major:{schist,granofels}, Minor:{amphibolite}, Incidental:{calc silicate rock}

Reference: Horton, J.D., C.A. San Juan, and D.B. Stoeser. The State Geologic Map Compilation (SGMC) geodatabase of the conterminous United States. doi: 10.3133/ds1052. U.S. Geological Survey Data Series 1052. [133]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License



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References

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Cruson, Daniel. (1991), Feldspar Quarries and The Mining History of Newtown. Triassic Valley Bulletin: August/September.

 
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