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Danbury, Fairfield Co., Connecticut, USA
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Latitude: 41°23'41"N
Longitude: 73°27'16"W
 
 
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 List

Mineral list contains entries from the region specified including sub-localities
Albite
var: Oligoclase
'Allanite'
Almandine
Aragonite
Augite
Baryte
'Biotite'
'Brewsterite' ?
Calcite
Celestine
Chalcopyrite
Chondrodite
Clinochlore
'Columbite'
Danburite (TL)
Datolite
Diopside
Dolomite
Epistilbite ?
Fluorapatite
Forsterite
'Garnet'
Graphite
Gypsum
var: Selenite

'Hornblende'
Ilmenite
'Limonite'
Microcline
'Moonstone'
Muscovite
Opal
Orthoclase
Palygorskite
Phlogopite
Pyrite
'Pyroxene Group'
Pyrrhotite
Quartz
Rutile
'Scapolite'
Scheelite
Spinel
'Stilbite'
Talc
Thorite
Thorogummite
Titanite
Tremolite
Zircon


70 entries listed. 37 valid minerals. 1 type locality (valid mineral).

Localities in this Region

USA

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References

Manchester, James G. (1931): The Minerals of New York City and Its Environs. New York Mineralogical Club Bulletin: 3 (1): 70.

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.

External Links


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Copyright © Jolyon Ralph and Ida Chau 1993-2014. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of thousands of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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