In structural geology, an anticline is an arch-shaped fold in rock layers with its oldest beds at its core, the inverse of a syncline. A typical anticline is convex upward, with a hinge or crest where curvature is greatest and limbs that dip away on either side. An anticline is distinguished from the more general term antiform by the fact that its rock layers can be shown to grow progressively older toward the fold's center; where that age relationship is unknown, geologists use the term antiform instead.
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