Danbury, Fairfield Co., Connecticut, USA
|Latitude & Longitude (WGS84):||41° 23' 41'' North , 73° 27' 16'' West|
|Latitude & Longitude (decimal):||41.39472,-73.45444|
|Köppen climate type:||Cfa : Humid subtropical climate|
A city first incorporated as a town in 1702. Most famous mineralogically for the danburite type locality (see http://www.mindat.org/loc-243666.html).
Its bedrock geology is very complex because the city lies over a folded section of Cameron's Line, a major thrust fault separating Ordovician Ratlum Mountain schist of oceanic origin (and intruded Brookfield diorite gneiss) under Shelter Rock from metamorphosed continental shelf deposits (marble, quartzite, gneiss) overlying Lauretian basement under most of the city. The Cambrian Stockbridge marble underlies low lying areas NE and SE of Shelter Rock, and under Mill Plain to the west. The Still River and Limekiln Brook generally follow these lowlands. The highlands occupying most of the north and southwest parts of the city are underlain by very resistant rocks of the Cambrian Dalton formation and the Proterozoic Laurentian gneisses, which in the southwest have been cut up by probable Mesozoic normal faulting.
Mineral ListMineral list contains entries from the region specified including sub-localities
44 valid minerals. 1 (TL) - type locality of valid minerals.
Rock Types Recorded
Rock list contains entries from the region specified including sub-localities
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Entries shown in red are rocks recorded for this region.
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 - Cambrian|
470 - 541 Ma
|Stockbridge Marble (Including Inwood Marble)|
Age: Paleozoic (470 - 541 Ma)
Stratigraphic Name: Stockbridge Marble
Description: White to gray, massive to layered marble, generally dolomitic but containing calcite marble in upper part, locally interlayered with schist or phyllite and with calcareous siltstone or sandstone.
Comments: Part of Western Uplands; Proto-North American (Continental) Terrane - Carbonate Shelf
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. 
Localities in this Region
Clarke, James W. (1958): The Bedrock Geology of the Danbury Quadrangle. State Geological and Natural History Survey of Connecticut Quadrangle Report No. 7.
Januzzi, Ronald E. (1959): The Minerals of Western Connecticut and Southeastern New York. The Mineralogical Press, Danbury, Connecticut.
Pawloski, John A. (1965): Two Interesting Zeolites from Connecticut. Rocks and Minerals: 40(7): 494.
Januzzi, Ronald E. (1976): Mineral Localities of Connecticut and Southeastern New York State. The Mineralogical Press, Danbury, Connecticut.
Tschernich, Rudy. (1992): Zeolites of the World. Geoscience Press, Phoenix: 85, 154.
Januzzi, Ronald E. (1994), Mineral Data Book - Western Connecticut and Environs. The Mineralogical Press, Danbury, Connecticut.