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

  1. Iriarte, E. 1
  2. Caron, M. 2
  1. 1 Universidad del País Vasco/Euskal Herriko Unibertsitatea
    info

    Universidad del País Vasco/Euskal Herriko Unibertsitatea

    Lejona, España

    ROR https://ror.org/000xsnr85

  2. 2 Université de Fribourg, Suiza
Revista:
Geogaceta

ISSN: 0213-683X

Año de publicación: 2003

Número: 34

Páginas: 71-74

Tipo: Artículo

Otras publicaciones en: Geogaceta

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.