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Cortlandt Township, Westchester Co., New York, USA

StandardDetailedBy ChemistrySearch GoogleMineral Report for Region

[Note that the city of Peekskill is no longer part of Cortlandt.]




Mineral list contains entries from the region specified including sub-localities


Mineral List:
  		•  Albite
    var: Oligoclase
    (Na,Ca)[Al(Si,Al)Si
     
    2
    		O
     
    8
    		]
    Reference: [The Minerals of New York City & Its Environs, New York Mineralogical Club Bull., Vol. 3, No. 1, Manchester, J.G. (1931): 70.]
  		•  Almandine
    Fe
    2+
    3
    		Al
     
    2
    		[SiO
     
    4
    		]
     
    3
    Reference: [Eur. J. Mineral. , 1991, 3, pp. 367-386.]
  		•  'Amphibole Group'
    Reference: [The Minerals of New York City & Its Environs, New York Mineralogical Club Bull., Vol. 3, No. 1, Manchester, J.G. (1931): 70.]
  		•  Biotite
    Reference: [The Minerals of New York City & Its Environs, New York Mineralogical Club Bull., Vol. 3, No. 1, Manchester, J.G. (1931): 70.]
  		•  Calcite
    CaCO
     
    3
    Reference: [The Minerals of New York City & Its Environs, New York Mineralogical Club Bull., Vol. 3, No. 1, Manchester, J.G. (1931): 70.]
  		•  'Chlorite Group'
    Reference: [The Minerals of New York City & Its Environs, New York Mineralogical Club Bull., Vol. 3, No. 1, Manchester, J.G. (1931): 72.]
  		•  Cordierite
    (Mg,Fe)
     
    2
    		Al
     
    4
    		Si
     
    5
    		O
     
    18
    Reference: [Jensen (1978) Minerals of New York State, p.153]
  		•  Corundum
    Al
     
    2
    		O
     
    3
    Reference: [Mineralogical Magazine 1963 33 : 635-645]
  		•  'Emery'
    Reference: [Jensen (1978) Minerals of New York State, p.153]
  		•  Epidote
    {Ca
     
    2
    		}{Al
     
    2
    		Fe
    3+
     
    		}[O|OH|SiO
     
    4
    		|Si
     
    2
    		O
     
    7
    		]
    Reference: [Alfredo Petrov, field observation.]
  		•  'Garnet Group'
    X
     
    3
    		Z
     
    2
    		(TO
     
    4
    		)
     
    3
    		 (X = Ca, Fe, etc·, Z = Al, Cr, etc·, T = Si, As, V)
    Reference: [The Minerals of New York City & Its Environs, New York Mineralogical Club Bull., Vol. 3, No. 1, Manchester, J.G. (1931): 70.; The Minerals of New York City & Its Environs, New York Mineralogical Club Bull., Vol. 3, No. 1, Manchester, J.G. (1931): 72.]
  		•  Hercynite
    FeAl
     
    2
    		O
     
    4
    Description: Fe-rich hercynite associated with quartz. Mg-rich hercynite inclusions in sapphirine, garnet and opx.
    Reference: [Eur. J. Mineral. , 1991, 3, pp. 367-386.]
  		•  Högbomite
    (Mg,Fe)
     
    2
    		(Al,Ti)
     
    5
    		O
     
    10
    Reference: []
  		•  Kyanite
    Al
     
    2
    		[O|SiO
     
    4
    		]
    Reference: [The Minerals of New York City & Its Environs, New York Mineralogical Club Bull., Vol. 3, No. 1, Manchester, J.G. (1931): 70.; The Minerals of New York City & Its Environs, New York Mineralogical Club Bull., Vol. 3, No. 1, Manchester, J.G. (1931): 72.]
  		•  Magnesioriebeckite
    [ ][Na
     
    2
    		][Mg
     
    3
    		Fe
    3+
    2
    		][(OH)
     
    2
    		|Si
     
    8
    		O
     
    22
    		]
    Reference: [SEM/EDS analysis by Excalibur Mineral Co.]
  		•  Magnetite
    Fe
    2+
     
    		Fe
    3+
    2
    		O
     
    4
    Reference: [The Minerals of New York City & Its Environs, New York Mineralogical Club Bull., Vol. 3, No. 1, Manchester, J.G. (1931): 70.; The Minerals of New York City & Its Environs, New York Mineralogical Club Bull., Vol. 3, No. 1, Manchester, J.G. (1931): 72.]
  		•  Magnetite
    var: Titaniferous Magnetite
    Fe
    2+
     
    		(Fe
    3+
     
    		,Ti)
     
    2
    		O
     
    4
    Reference: [Mineralogical Magazine 1963 33 : 635-645]
  		•  Muscovite
    KAl
     
    2
    		[(OH)
     
    2
    		|AlSi
     
    3
    		O
     
    10
    		]
    Reference: [The Minerals of New York City & Its Environs, New York Mineralogical Club Bull., Vol. 3, No. 1, Manchester, J.G. (1931): 70.]
  		•  Opal
    SiO
     
    2
    		·nH
     
    2
    		O
    Reference: [Rocks & Min.:8:39.]
  		•  'Orthopyroxene Subgroup'
    Reference: [Eur. J. Mineral. , 1991, 3, pp. 367-386.]
  		•  'Pyroxene Group'
    Reference: [The Minerals of New York City & Its Environs, New York Mineralogical Club Bull., Vol. 3, No. 1, Manchester, J.G. (1931): 70.]
  		•  Quartz
    SiO
     
    2
    Reference: [Eur. J. Mineral. , 1991, 3, pp. 367-386.]
  		•  Sapphirine
    (Mg,Fe)
     
    4-x
    		Al
     
    4+x
    		[Al
     
    4+x
    		Si
     
    2-x
    		O
     
    18
    		]O
     
    2
    Reference: [Jensen (1978) Minerals of New York State, p.153; Mineralogical Magazine 1963 33 : 635-645]
  		•  Sillimanite
    Al
     
    2
    		[O|SiO
     
    4
    		]
    Reference: [Jensen (1978) Minerals of New York State, p.153]
  		•  Spinel
    MgAl
     
    2
    		O
     
    4
    Reference: [Mineralogical Magazine 1963 33 : 635-645]
  		•  Spinel
    var: Ceylonite
    Reference: [The Minerals of New York City & Its Environs, New York Mineralogical Club Bull., Vol. 3, No. 1, Manchester, J.G. (1931): 70.]
  		•  Staurolite
    (Fe
    2+
     
    		,Mg,Zn)
     
    1.5-2
    		Al
     
    9
    		[O
     
    6
    		|(OH,O)
     
    2
    		|(SiO
     
    4
    		)
     
    4
    		]
    Reference: [The Minerals of New York City & Its Environs, New York Mineralogical Club Bull., Vol. 3, No. 1, Manchester, J.G. (1931): 70.]
  		•  'Tourmaline'
    AD
     
    3
    		G
     
    6
    		(BO
     
    3
    		)
     
    3
    		[T
     
    6
    		O
     
    18
    		]Y
     
    3
    		Z
    Reference: [The Minerals of New York City & Its Environs, New York Mineralogical Club Bull., Vol. 3, No. 1, Manchester, J.G. (1931): 72.]


    28 entries listed. 16 valid minerals.

    Localities in this Region:
    USA
     
    • New York
      • Westchester Co.
        • Cortlandt Township
          • Montrose

    The above list contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database!
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    Copyright © Jolyon Ralph and Ida Chau 1993-2009. Jobs in New York, USA Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the 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 hundreds of members and supporters. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 26th Nov 2009 07:09:10