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Robertson pit (Robertson quarry), Dayton, Mason Co., Washington, USA

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A traprock quarry in Eocene submarine pillow basalt of the Crescent formation. Owned by Simpson Timber Co., Shelton, WA. Located 3.5 miles SW of Dayton.

Ref.:
Rocks & Min.: 63:24-28.
Tschernich, R. (1992): Zeolites of the World, 71





Mineral List:
  		•  Analcime
    Na
     
    2
    		[Al
     
    2
    		Si
     
    4
    		O
     
    12
    		] · 2H
     
    2
    		O
    Habit: trapazohedra to 20mm in diameter
    Colour: colorless (some with green chlorite inclusions); white
    Reference: [Rocks & Min.: 63:24-28; Tschernich, R. (1992): Zeolites of the World, 71]
    Site Photo
    Robertson pit (Robertson quarry), Dayton, Mason Co., Washington, USA
     
  		•  Calcite
    CaCO
     
    3
    Colour: yellow
    Reference: [Rocks & Min.: 63:24-28; Tschernich, R. (1992): Zeolites of the World, 71]
  		•  'Chabazite'
    Reference: [Tschernich, R. (1992): Zeolites of the World, 71]
  		•  'Chlorite Group'
    Colour: green (sometimes as inclusions in analcime)
    Reference: [Rocks & Min.: 63:24-28; Tschernich, R. (1992): Zeolites of the World, 71]
  		•  Mesolite
    Na
     
    2
    		Ca
     
    2
    		[Al
     
    2
    		Si
     
    3
    		O
     
    10
    		]
     
    3
    		 · 8H
     
    2
    		O
    Reference: [Tschernich, R. (1992): Zeolites of the World, 71]
  		•  Natrolite
    Na
     
    2
    		[Al
     
    2
    		Si
     
    3
    		O
     
    10
    		] · 2H
     
    2
    		O
    Reference: [Rocks & Min.: 63:24-28; Tschernich, R. (1992): Zeolites of the World, 71]
    Site Photo
    Robertson pit (Robertson quarry), Dayton, Mason Co., Washington, USA
    © John Sobolewski
  		•  Pyrite
    FeS
     
    2
    Reference: [Rocks & Min.: 63:24-28; Tschernich, R. (1992): Zeolites of the World, 71]


    7 entries listed. 5 valid minerals.


    Mineral Paragenesis:
    earlylate

    Zeolites of the World, Rudy W. Tschernich, 1992

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