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Inversion tectonics and the evolution of the High Atlas Mountains, Morocco, based on a geological-geophysical transect

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dc.contributor.authorBeauchamp, W.
dc.contributor.authorAllmendinger, R.
dc.contributor.authorBarazangi, M.
dc.contributor.authorDemnati, A.
dc.contributor.authorEl Alji, M.
dc.contributor.authorDahmani, M.
dc.date.accessioned2007-01-26T16:19:46Z
dc.date.available2007-01-26T16:19:46Z
dc.date.issued1999
dc.descriptionAn edited version of this paper was published by the American Geophysical Union (AGU). Copyright 1998, AGU. See also: http://www.agu.org/pubs/crossref/1999/1998TC900015.shtml; http://atlas.geo.cornell.edu/morocco/publications/beauchamp1999.htmen_US
dc.description.abstractThe High Atlas Mountains of North Africa were formed over a major intracontinental rift system that had extended from what is now the Atlantic margin of Morocco to the Mediterranean coast of Tunisia. The Atlas rift system began in the Triassic and was active through the Jurassic. The inversion phase of the Atlas rift system began in the Early Cretaceous and extended into the present. The major uplift phase occurred between 30 and 20 Ma (Oligocene-Miocene) and corresponds to the Alpine orogenic event. The uplift and inversion of the Atlas rift system resulted in a shortening of the rift basin by a minimum of 36 km. A restoration of the deformed cross section indicates the original Atlas rift basin was approximately 113 km wide, comparable to the width of the present-day Red Sea. Synrift and postrift sedimentary rocks were uplifted by the reactivation of synrift normal faults, with further shortening along newly formed thin-skinned thrust faults. Structures formed by the reactivation of synrift faults resulted in structures with different geometries than those created by newly formed fault-bend and fault-propagation faults. Shortening across the High Atlas Mountains involved a partitioning of strain, with the greatest magnitude of shortening occurring along the margins of the High Atlas Mountains.en_US
dc.format.extent156467 bytes
dc.format.mimetypeapplication/pdf
dc.identifier.citationTectonics, vol. 8, p. 163-184, 1999en_US
dc.identifier.issn0278-7407
dc.identifier.urihttps://hdl.handle.net/1813/5272
dc.language.isoenen_US
dc.publisherAmerican Geophysical Unionen_US
dc.subjectAtlas Mountainsen_US
dc.subjectMoroccoen_US
dc.subjectInversion tectonicsen_US
dc.subjectBalanced crustal cross sectionen_US
dc.subjectReflection seismologyen_US
dc.subjectGeologic transectsen_US
dc.titleInversion tectonics and the evolution of the High Atlas Mountains, Morocco, based on a geological-geophysical transecten_US
dc.typeperiodicalen_US

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