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attrital coal

A bright coal (composed of anthraxylon and of attritus in which the translucent cell-wall degradation matter or translucent humic matter predominates) in which the ratio of anthraxylon to attritus is less than 1:3.

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Creador

  • ed.young
  • (Milwaukee, United States)

  •  (V.I.P) 21084 puntos
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