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The AAPG/Datapages Combined Publications Database
AAPG Special Volumes
Abstract
Edited By Authors:
Published |
Sans, M., and J. Vergés, 1995, Fold development related to contractional salt tectonics: southeastern Pyrenean thrust front, Spain, in M. P. A. Jackson, D. G. Roberts, and S. Snelson, eds., Salt tectonics: a global perspective: AAPG Memoir 65, p. 369-378. | ||||||||||||
Chapter
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Fold evolution has been reconstructed by interpreting variations along the strike of the folds as an indicator of deformation sequence. Where the sedimentary pile contains an upper detachment, thrusts developed fishtail geometries in which thrusts of alternating vergence were stacked up. Where an upper detachment is lacking, a thrusted anticline formed, into whose core salt migrated during the early phases of folding. Whether or not an upper detachment is present, anticlines continued to amplify during and after thrusting. Folding blocked further slip on some thrusts and promoted the development of pop-up structures. |
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