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Layered metamorphic rock formation with dramatic folds exposed on a roadside cliff next to a highway. Diagram showing three types of geological folds: a syncline with a downward trough, an anticline with an upward crest, and a monocline with a single bend, all labeled with axes, limbs, and axial plane. Diagram showing four types of geological folds in layered rock, from left to right: symmetrical fold, asymmetrical fold, overfold, and recumbent fold, with the inclination of the axial plane decreasing across the sequence. Red lines indicate the axial planes and axes, and the layers are shaded in brown tones. Figure 20: The forms of three types of folds.
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Article History

Type Description Contributor Date
Add new Web site: Geosciences LibreTexts - Folds. Oct 26, 2022
Added a photograph of a folded rock outcrop along a roadside. May 09, 2018
Article added to new online database. Jul 20, 1998
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