Axial plane

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  1. A plane through a rock fold that includes the axis and divides the fold as symmetrically as possible.
    Source: Leet, L. Don. 1982. Physical Geology, 6th Edition. Englewood Cliffs, NJ: Prentice-Hall
  2. A more or less planar surface that intersects a fold in such a manner that the limbs of the fold are symmetrically arranged with reference to it.
  3. The plane of the optic axes of an optically biaxial crystal.
  4. A crystallographic plane that includes two crystallographic axes. AGI
  5. Of geologic structures, a plane that intersects the crest of the trough or a fold such that the limbs, or sides, of the fold are more or less symmetrically arrayed with reference to it.
    Source: Dictionary of Mining, Mineral, and Related Terms


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