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Growth of the South Pyrenean orogenic wedge Public Deposited

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Abstract
  • A six-step reconstruction of the South Pyrenean foreland fold-and-thrust belt in Spain delineates the topographic slope, basal décollement angle, internal deformation, and thrust-front advance from the Early Eocene until the end of contractional deformation in the Late Oligocene. Style of thrust-front advance, dip of the basal décollement, slope of the upper surface, and internal deformation are decoupled and not simply related. Internal deformation increased, decreased, and maintained surface slope angle at different stages. From the onset to the cessation of deformation, the basal décollement angle decreased overall suggesting translation of the thrust belt onto stronger crust with time. Taper angle of the Pyrenean thrust wedge was fundamentally controlled by the flexural rigidity of the lower plate, the relative rate of creation of structural relief in the rear versus the front of the wedge, the extent of deposition of eroded material within the deforming wedge, and the taper of the pretectonic stratigraphic wedge.
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  • Meigs, A. J., and D. W. Burbank (1997), Growth of the South Pyrenean orogenic wedge, Tectonics, 16(2), 239–258, doi:10.1029/96TC03641
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  • 16
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  • 2
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  • Supported by NSF grant EAR-9304863 and grants from the Donors of the Petroleum Research Fund (ACS-28270-AC) to D.W.B. A.J.M. was supported by grants from A.A.P.G., G.S.A., and Sigma Xi and a Shell Foundation Fellowship.
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  • description.provenance : Submitted by Deanne Bruner (deanne.bruner@oregonstate.edu) on 2012-02-14T21:59:34Z No. of bitstreams: 1 MeigsAndrewCEOASGrowthSouthPyrenean.pdf: 3115571 bytes, checksum: a6e485654464568042a7f369c7d3d4c7 (MD5)
  • description.provenance : Made available in DSpace on 2012-02-14T21:59:34Z (GMT). No. of bitstreams: 1 MeigsAndrewCEOASGrowthSouthPyrenean.pdf: 3115571 bytes, checksum: a6e485654464568042a7f369c7d3d4c7 (MD5) Previous issue date: 1997

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