Sola, A. Rita; Pereira, M. Francisco; Williams, Ian; Ribeiro, M.L.; Neiva, A.M.R.; Montero, P.; Bea, F.; Zinger, T.
The Central Iberian-Ossa-Morena transition zone (SW Iberian Massif) represents a segment of the northern Gondwana margin with a long geodynamic evolution, characterized by the superposition of Cadomian and Variscan events. The Early Ordovician is mainly represented by porphyritic felsic volcaniclastic rocks (the Urra Formation) that pass up into a siliciclastic sediments typical of the Central Iberian Zone (Lower Ordovician Armorican Quartzite Formation). The Urra Formation unconformably...[Show more]
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