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  1. A configuration of folded, stratified rocks in which rocks dip in two directions away from a crest, as principal rafters of a common gable roof dip away from ridgepole. Reverse of syncline. The "ridgepole," or crest, is called axis.
    Source: Leet, L. Don. 1982. Physical Geology, 6th Edition. Englewood Cliffs, NJ: Prentice-Hall
  2. A fold, generally convex upward, whose core contains the stratigraphically older rocks. Ant. syncline. See also: antiform AGI
  3. Applied to strata that dip in opposite directions from a common ridge or axis, like the roof of a house; the structure is termed an anticline or saddleback. AGI
  4. In this type of fold (anticline) the sides or limbs of the fold typically slope away from the plane of the axis of either side. Every anticlinal axis pitches in two directions; i.e., toward the two ends of the fold. AGI
    Source: Dictionary of Mining, Mineral, and Related Terms

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