The Andatza coarse-grained turbidite system (westernmost Pyrenees)stratigraphy, sedimentology and structural control

  1. A. Bodego 1
  2. L. M. Agirrezabala 1
  1. 1 Universidad del País Vasco (UPV-EHU), España
Revue:
Estudios geológicos

ISSN: 0367-0449

Année de publication: 2017

Volumen: 73

Número: 1

Type: Article

DOI: 10.3989/EGEOL.42535.422 DIALNET GOOGLE SCHOLAR lock_openAccès ouvert editor

D'autres publications dans: Estudios geológicos

Objetivos de desarrollo sostenible

Résumé

This is a field-based work that describes the stratigraphy and sedimentology of the Andatza Conglomerate Formation. Based on facies analysis three facies associations of a coarse-grained turbidite system and the related slope have been identified: (1) an inner fan of a turbidite system (or canyon) and (2) a low- and (3) a high-gradient muddy slope respectively. The spatial distribution of the facies associations and the palaeocurrent analysis allow to interpret a depositional model for the Andatza Conglomerates consisting of an L-shaped, coarse-grained turbidite system, whose morphology was structurally controlled by synsedimentary basement-involved normal faults. The coarse-grained character of the turbidite system indicates the proximity of the source area, with the presence of a narrow shelf that fed the turbidite canyon from the north.

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