La diferenciación paleogeográfica de la Cuenca Catalana al principio del Jurásico Medio

  1. S. Fernández-López 12
  2. F. García Joral 12
  3. J.J. Gómez 12
  4. M.H.P. Henriques 3
  5. G. Martínez 12
  1. 1 Universidad Complutense de Madrid
    info

    Universidad Complutense de Madrid

    Madrid, España

    ROR 02p0gd045

  2. 2 Instituto de Geología Económica
    info

    Instituto de Geología Económica

    Madrid, España

  3. 3 Universidade de Coimbra
    info

    Universidade de Coimbra

    Coímbra, Portugal

    ROR https://ror.org/04z8k9a98

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Journal:
Revista de la Sociedad Geológica de España

ISSN: 0214-2708

Year of publication: 1998

Volume: 11

Issue: 1-2

Pages: 3-22

Type: Article

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Abstract

A new system of lithostratigraphical units, valid for the Toarcian, Aalenian and Bajocian deposits of the Catalan Basin is defined. Distribution patterns of these lithostratigraphical units and variations of facies to a zonal scale enable the interpretation of three palaeogeographical sectors at the beginning of the Middle Jurassic: Tivissa-Salou, Alfara-Cardó and Los Puertos de Beceite. These three sectors, conditioned by synsedimentary faults, were progressively differentiated through the Toarcian, Aalenian and Bajocian. Two environmental deepening/shallowing megacycles were developed in the Catalan Basin during the latest Early Jurassic and the earliest Middle Jurassic. The transgressive peaks of these two second-order cycles occurred respectively in the Bifrons (Toarcian) and Niortense (Bajocian) biochrones. Both megacydes were separated by a regressive peak during the Murchisonae Biochron (Aalenian). The Platform of Tortosa, comprising the sectors of Tivissa-Salou and Alfara-Cardó, reached the maximum subsidence during the late Bajocian.

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