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Magnitude of lateral displacement on the Crevillente fault zone (Betic Cordillera, SE Spain); stratigraphical and sedimentological considerations

Magnitude of lateral displacement on the Crevillente fault zone (Betic Cordillera, SE Spain); stratigraphical and sedimentological considerations

Geological Journal 39(1): 95-110

The Crevillente Fault Zone (CFZ) comprises a system of northeast to southwest oriented dextral faults that extend for some 600 km in the External Zones of the Betic Cordillera (SE Spain). The magnitude of lateral displacement related to this fault zone is not well constrained, and it is considered to be between 20 and 400 km. The stratigraphical and sedimentological criteria used in this work have proven effective in quantifying the magnitude of the displacement along this structure. We have analysed an oolitic turbidite facies in the Middle Jurassic of the Sierra de Ricote (Median Subbetic of Murcia Province). A detailed revision of ooidal limestone outcrops has revealed that the source area of these deposits was to the Internal Subbetic zone, north of Velez Rubio (Almeria Province). These two tectonic units, the Median and Internal Subbetic, are currently 75 km from each other and separated by the CFZ. The conclusions arising from our stratigraphical, petrological and sedimentological studies favour interpretation of a 75-100 km lateral displacement. After restoring the Late Jurassic-Cretaceous anticlockwise rotation of Iberia, the CFZ appears to belong to the E-W palaeofault system that is related to the extension of the South Iberian Continental Margin (SICM). Abstract Copyright (2004), Wiley Periodicals, Inc.

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Accession: 019361523

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DOI: 10.1002/gj.946

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