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Hungry Hill, Guilford, New Haven Co., Connecticut, USA


List of minerals arranged by Dana 8th Edition classification
Group 52 - NESOSILICATES Insular SiO4 Groups and O,OH,F,H2O
Insular SiO4 Groups and O, OH, F, and H2O with cations in [4] and >[4] coordination
Sillimanite52.2.2a.1Al2(SiO4)O
Group 58 - SOROSILICATES Insular, Mixed, Single, and Larger Tetrahedral Groups
Insular, Mixed, Single, and Larger Tetrahedral Groups with cations in [6] and higher coordination; single and double groups (n = 1, 2)
Vesuvianite58.2.4.1(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
Group 61 - CYCLOSILICATES Six-Membered Rings
Six-Membered Rings with Al substituted rings
Cordierite61.2.1.1(Mg,Fe)2Al3(AlSi5O18)
Unclassified Minerals
Biotite-
'Garnet'-X3Z2(SiO4)3


5 entries listed. 3 valid minerals.

References

Hovey, E. O. (1888): A Cordierite Gneiss from Connecticut. American Journal of Science, Third Series, Vol. 36, No. 211, pp. 57-58.

Foye, W. G. (1949): The Geology of Eastern Connecticut. Connecticut Geological and Natural History Survey Bulletin 74, p.83.

Januzzi, Ronald E. (1976): Mineral Localities of Connecticut and Southeastern New York State. (Taylor Assoc./Mineralogical Press).

Ryerson, Kathleen. (1976): Rock Hound's Guide to Connecticut. Pequot Press.

Weber, Marcelle H. and Earle C. Sullivan. (1995): Connecticut Mineral Locality Index. Rocks & Minerals (Connecticut Issue), Vol. 70, No. 6, p. 403.

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