Abstract
Gentle minor folds occur on the steeper eastern limb of the Wigpool Syncline in the Lower Limestone Shale and Lower Dolomite formations of the Forest of Dean. They are coaxial with the major syncline. Instead of the expected S-shaped asymmetry, they show Z-shaped asymmetry. This is explained by their suggested mode of origin by gravity gliding of the competent formations of the Carboniferous Limestone group off the May Hill Anticline, with the incompetent Lower Limestone Shale acting as the lubrication horizon. It is recommended that rules linking the asymmetry of minor folds to their position in major folds be applied with caution in tectonic settings where gravity sliding may have occurred.
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