The Quartzite Problem Revisited

  title={The Quartzite Problem Revisited},
  author={Jeffrey L. Howard},
  journal={The Journal of Geology},
  pages={707 - 713}
  • J. Howard
  • Published 1 November 2005
  • Geology
  • The Journal of Geology
A review of past terminology and previous petrological studies suggests that quartzite should be classified descriptively as both a sedimentary and a metamorphic rock. Quartzite is identified in the field as a quartz‐rich rock (exclusive of chert and vein quartz) that is exceptionally hard and, when broken by a rock hammer, fractures irregularly through both grains and cement (where present) to form an irregular or conchoidal fracture surface. Quartzite is differentiated from quartzose… 
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  • R. Folk
  • Geology
    The Journal of Geology
  • 1954
A system of grain-size nomenclature of terrigenous sediments and sedimentary rocks is introduced wherein fifteen major textural groups are defined on the ratios of gravel, sand, silt, and clay.
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