The transition from upright to recumbent folding in the Variscan fold belt of southwest England: a model based on the kinematics of simple shear
Journal of Structural Geology, 1, (3), . (doi:10.1016/0191-8141(79)90037-3).
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A transition from upright folds, at high structural levels, to recumbent folds at depth is described from the Variscan fold belt in southwest England. The folds tighten and cleavage intensifies progressively as the axial plane dip decreases. A simple shear model is developed in which the shortening of a multilayer and its folding produces initially upright open folds which tighten as they rotate during increasing shear strain. The model predicts the observed relationship between interlimb angle and axial plane dip and is used to discuss the development of the structure of north Cornwall.
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