Cleavage-Bedding-Fold Relationships

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Relationships among cleavage, bedding, cleavage-bedding intersection lineations, fold axis, fold hinge line, and axial plane for an antiformal fold, England. The trace of bedding on the profile plane is shown in yellow. The axial plane (red) approximately bisects the interlimb angle. The hinge line (blue) represents the line of maximum curvature and corresponds to the line where the axial plane intersects a bedding surface. Cleavage traces on the profile plane are shown in green, are parallel to the axial plane. Therefore, cleavage is axial planar. A cleavage-bedding intersection lineation is shown by the purple line. This is parallel to the fold axis. The orientation of the fold axis is parallel to the orientation of the fold hinge line. Photo by John Ramsay.
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