Caracterización de las unidades tectosedimentarias paleógenas de la Cuenca de Almazán

• A. Maestro-González ^[1] ; A. Casas-Sainz ^[1] ; A.L. Cortés-Gracia ^[1]
  1. [1] Universidad de Zaragoza

     Universidad de Zaragoza

     Zaragoza, España

     
• Localización: Geotemas (Madrid), ISSN 1576-5172, Nº. 2, 2000 (Ejemplar dedicado a: IV Congreso del Grupo Español del Terciario (Tremp, 19-21 septiembre, 2000)), págs. 137-139
• Idioma: español
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• Resumen

  • The Almazàn Basin, showing an overall synclinal geometry, is one of the most subsiding areas during the Tertiary in the inner part of the Iberian plate, with more than 3500 m of preserved Tertiary non-marine sediments. They are arranged in four Paleogenes tectonosedimentary units (A I to A4), bounded by unconformities at the basin borders. The deposits are conglomerates, sandstones, shales and lacustrine limestones, associated to alluvial fans, most of them sourced at the northern basin border. The maximum thickness of units A l to A4 are 500 m, 2000 m, 1100 m, and 400 m, respectively. The age of the first three units (Al to A3) ranges from the Late Eocene (Headonian, near the top of A l) to the Early Miocene (Agenian, base of A4).