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Crump's Quarry, Mineral Hill, Elwyn, Middletown Township, Delaware Co., Pennsylvania, USA

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Described as being on the "grounds of the Pennsylvania Training School for the Feeble Minded.", 0.4 km (0.25 mile) north of State Road, and 1.6 km (1 mile) west of Media. Feldspar quarries, pegmatites, and exposures are nearby.

In "pyroxenite" and "metaperidotite."



References:
Gordon's Mineralogy of Pennsylvania (1922) p. 191




Group 4 - Oxides and Hydroxides
  		• Chromite4.BB.05
    FeCr
     
    2
    		O
     
    4
  		• Corundum4.CB.05
    Al
     
    2
    		O
     
    3
  		• Microlite4.DH.15
    (Ca,Na)
     
    2
    		Ta
     
    2
    		O
     
    6
    		(O,OH,F)
  		• Quartz4.DA.05
    SiO
     
    2
  		• Samarskite-(Y)4.DB.25
    (Y,Fe
    3+
     
    		,Fe
    2+
     
    		,U,Th,Ca)
     
    2
    		(Nb,Ta)
     
    2
    		O
     
    8
    Group 5 - Nitrates and Carbonates
  		• Magnesite5.AB.05
    MgCO
     
    3
    Group 9 - Silicates
  		• Actinolite9.DE.10
    ☐Ca
     
    2
    		(Mg,Fe
    2+
     
    		)
     
    5
    		(Si
     
    8
    		O
     
    22
    		)(OH)
     
    2
  		• Albite
    var: Albite Moonstone    		9.FA.35
    Na[AlSi
     
    3
    		O
     
    8
    		]
      var: Sunstone9.FA.35
    (Na,Ca)[Al(Si,Al)Si
     
    2
    		O
     
    8
    		]
  		• Almandine9.AD.25
    Fe
    2+
    3
    		Al
     
    2
    		[SiO
     
    4
    		]
     
    3
  		• Anthophyllite9.DE.05
    ☐[Mg
     
    2
    		][Mg
     
    5
    		][(OH)
     
    2
    		|Si
     
    8
    		O
     
    22
    		]
  		• Beryl9.CJ.05
    Be
     
    3
    		Al
     
    2
    		Si
     
    6
    		O
     
    18
  		• Enstatite9.DA.05
    Mg
     
    2
    		[SiO
     
    3
    		]
     
    2
  		• Microcline
    var: Amazonite    		9.FA.30
    K[AlSi
     
    3
    		O
     
    8
    		]
  		• Orthoclase9.FA.30
    K[AlSi
     
    3
    		O
     
    8
    		]
      var: Delawarite9.FA.30
    K[AlSi
     
    3
    		O
     
    8
    		]
  		• Talc9.EC.05
    Mg
     
    3
    		Si
     
    4
    		O
     
    10
    		(OH)
     
    2
  		• Tremolite9.DE.10
    ☐[Ca
     
    2
    		][Mg
     
    5
    		][(OH)
     
    2
    		|Si
     
    8
    		O
     
    22
    		]
  		• Vermiculite9.EC.50
    (Mg,Fe,Al)
     
    3
    		(Al,Si)
     
    4
    		O
     
    10
    		(OH)
     
    2
    		·4H
     
    2
    		O
    Unclassified Minerals
  		• 'Asbestos'-
  		• 'Chlorite Group'-
  		• Columbite-
    (Fe,Mn)(Nb,Ta)
     
    2
    		O
     
    6
  		• 'Deweylite'-
    Mg
     
    4
    		Si
     
    3
    		O
     
    10
    		·6H
     
    2
    		O ?
  		• 'Fergusonite'-
  		• 'Hornblende'-
  		• Hypersthene-
    (Fe,Mg)SiO
     
    3
  		• 'Serpentine Group'-
    D
     
    2
    		[Si
     
    2
    		O
     
    5
    		](OH)4 + or - nH
     
    2
    		O
      'var: Retinalite'-
    D
     
    2
    		[Si
     
    2
    		O
     
    5
    		](OH)4 + or - nH
     
    2
    		O


    28 entries listed. 19 valid minerals.

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    Copyright © Jolyon Ralph and Ida Chau 1993-2009. Jobs in Pennsylvania, 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: 5th Nov 2009 17:34:35