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sparse vitrain

A field term to denote, in accordance with an arbitrary scale established for use in describing banded coal, a frequency of occurrence of vitrain bands comprising less than 15% of the total coal layer. Compare: abundant vitrain; dominant vitrain; moderate vitrain.

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Penulis

  • ed.young
  • (Milwaukee, United States)

  •  (V.I.P) 21084 poin
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