Petrography

• Mineralogy
  

  • Primary Minerals
    - source area
    
  • Secondary Minerals
    - post depositional history (diagenesis)
    

• Classification of Sandstones
  

  • Quartzarenite (> 95% quartz)
    
  • Arkose (feldspar dominated)
    
  • Litharenite (graywacke) (rock fragment dominated)
    

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Quartzarenite - Cambrian Bliss Sandstone

(plane light)

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(polarized light- cross-nicols)

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Litharenite - David River Formation

(plane light)

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(polarized light- cross-nicols)

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last updated 1-2-98

All original material copyright (c) 1998 by Annabelle Foos. All rights reserved.