Foliation (geology) - Description

Description

When describing a foliation it is useful to note

  • the mineralogy of the folia; this can provide information on the conditions of formation
  • the mineralogy in intrafolial areas
  • foliation spacing
  • any porphyroblasts or minerals associated with the foliation and whether they overprint it or are cut by it
  • whether it is planar, undulose, vague or well developed
  • its orientation in space, as strike and dip, or dip and dip direction
  • its relationship to other foliations, to bedding and any folding
  • measure intersection lineations

Following such a methodology allows eventual correlations in style, metamorphic grade, and intensity throughout a region, relationship to faults, shears, structures and mineral assemblages.

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