Review of the Ediacaran-Lower Ordovician (pre-Sardic) stratigraphic framework of the Eastern Pyrenees, southwestern Europe.

Padel, M. ^[3] ; Clausen, S. ^[4] ; Álvaro, J.J. ^[1] ; Casas Tuset, Josep Maria ^[2]
1. [1] Universidad Complutense de Madrid
  
  Universidad Complutense de Madrid
  
  Madrid, España
2. [2] Universitat de Barcelona
  
  Universitat de Barcelona
  
  Barcelona, España
3. [3] Bureau de Recherches Géologiques et Minières-BRGM
4. [4] Université de Lille
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Localización: Geologica acta: an international earth science journal, ISSN 1695-6133, Vol. 16, Nº. Extra 4, 2018 (Ejemplar dedicado a: . Special Issue: a tribute to Pere Santanach.), págs. 339-355
Idioma: catalán
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Resumen
- The Ediacaran-Lower Ordovician successions exposed in the Eastern Pyrenees are updated and revised based on recent U-Pb zircon radiometric ages, intertonguing relationships of carbonate-dominated strata, and onlapping patterns marking the top of volcano-sedimentary complexes. A stratigraphic comparison with neighbouring pre-Variscan outcrops from the Montagne Noire (southern French Massif Central) and Sardinia is related to i) the absence of Cadomian deformation close to the Ediacaran-Cambrian boundary interval; ii) the presence of an episodic, Cadomian-related, acidic-dominant volcanism related to carbonate production punctuating the Ediacaran-Cambrian transition, similar to that recorded in the northern Montagne Noire; and iii) the lack of Guzhangian (Late Cambrian Epoch 3) regressive shoal complexes present in the Montagne Noire and probably in Sardinia.