La evolución de los sistemas fluviales del Ebro y del Duero durante el Cenozoico superior

• D. Mikes ^[1] ; J. Verges ^[1] ; M. Fernández ^[1] ; D. García-Castellanos ^[3] ; A. Pineda-Velasco ^[4] ; Jose Luis Peña-Monné ^[2] ; Juan Plaza ^[5]
  1. [1] Instituto de Ciencias de la Tierra Jaume Almera

     Instituto de Ciencias de la Tierra Jaume Almera

     Barcelona, España

     
  2. [2] Universidad de Zaragoza

     Universidad de Zaragoza

     Zaragoza, España

     
  3. [3] Free University, Amsterdam
  4. [4] EPTISA
  5. [5] ENRESA

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• Localización: Geotemas (Madrid), ISSN 1576-5172, Nº. 6, 2, 2004 (Ejemplar dedicado a: IV Congreso Geológico de España), págs. 187-189
• Idioma: español
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• Resumen

  • In this work we present the Cenozoic sedimentary evolution of the Bureba region, situated between the Ebro Basin and the Duero Basin. We have assembled a series of paleogeographical maps from published data, which we supplemented with field data relating the evolution of the two fluvial systems of Ebro and Duero.

    The two sedimentary basins show foreland basin behaviour with rapid subsidence from late Eocene until the earliest Miocene (approx. 37 - 22 Ma) after which they are in filled by slow sedimentation until the earliest Late Miocene for the Ebro (approx. 10 Ma) and until the limit between Miocene-Pliocene in the Duero (approx. 5 Ma).

    In the NE part of the hydrographical Duero Basin, several wind gaps point to the existence of an ancient fluvial system that drained the western part of the Bureba region towards the Duero. It has subsequently been captured and entirely eroded by tributaries to the Ebro until erosion reached its present position partly controlled by folded Mesozoic rocks.