Edad de los términos basales del Cretácico Superior de la Depresión Intermedia (Pirineos occidentales, Nafarroa)

• Iriarte, E. ^[1] ; Caron, M. ^[2]
  1. [1] Universidad del País Vasco/Euskal Herriko Unibertsitatea

     Universidad del País Vasco/Euskal Herriko Unibertsitatea

     Leioa, España

     
  2. [2] University of Fribourg

     University of Fribourg

     Friburgo, Suiza

     
• Localización: Geogaceta, ISSN 0213-683X, Nº. 34, 2003, págs. 71-74
• Idioma: español
• Títulos paralelos:
  • Age of Upper Cretaceous basal sediments of the Central Depression (Western Pyrenees, Navarre)
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• Resumen

  • The age of Upper Cretaceous basal sediments of the Central Depression (Western Pyrenees) has been considered to range from Cenomanian to Santonian according to previous authors. Newly studied samples show 3 planktonic foraminifera associations corresponding to M. schneegansi Zone, D. concavata Zone and D. asymetrica Zone. Thus, the base of the Upper Cretaceous is diachronous. This diachronism is attributed to the onlap of both previously formed pa/aeoreliefs (Upper Albian to Upper Turonian) and synsedimentary horst and graben created during the Upper Turonian-Coniacian lapse of time.