Geología de las zonas Centro Ibérica y Galicia – Trás-Os-Montes en la parte oriental del Complejo de Morais, Portugal/España
type: CreativeWork
description: [EN] The Morais Allochthonous Complex (MAC) belonging to the Galicia Trás-os-Montes Zone, (GTMZ) is placed in the hinge zone of the Central Iberian Arc (CIA). Evidences of the pre- to syn-Variscan geological evolution of the NW Iberia are especially well exposed along the eastern rim of this first order structure, where this research work was achieved. Two major tectono-stratigraphic domains juxtaposed by a significant Variscan tectonic accident were redefined: the Schistose Domain of Galicia Trás-os-Montes (SDGTM) and Central Iberian Zone (CIZ). The first domain belongs to the lowermost tectonic slice of the different imbricated allochthonous units of the GTMZ. The SDGTM was settled over the CIZ during the Variscan C2 stage by the Main Trás-os-Montes Thrust (MTMT), and it is considered to be the least allochthonous unit (also called Parautochthonous or Peritransmontano Domain). Since the pre-variscan stratigraphic records of both domains are very similar, it is assumed that they must have been attached to the same continental margin but in different palaeogeographic locations, as their detrital zircon age populations point out. Both domains present a quite continuous and traceable Cambro-Silurian (?) stratigraphic sequence, although it underwent more Variscan deformation in the SDGTM than in its relative autochthonous (CIZ). In the CIZ the identification of two ichnofossil genera in the Desejosa Formation (Teichichnus rectus and Rosselia socialis) confirms that its upper part is at least uppermost-early Cambrian (Cambrian Stage 3), as previously proposed near the studied region with badly preserved trilobite remains (522Ma). A new stratigraphic unit (Montes Ermos formation, informal) was found concordantly overlaying the Desejosa Formation and lying below the Lower Ordovician unconformity (or Toledanic Unconformity) meaning that the uppermost record of the Slate and Greywacke Complex in Iberia could reach ages younger than Cambrian Stage 3. Over the Toledanic uncon…
abstract: [EN] The Morais Allochthonous Complex (MAC) belonging to the Galicia Trás-os-Montes Zone, (GTMZ) is placed in the hinge zone of the Central Iberian Arc (CIA). Evidences of the pre- to syn-Variscan geological evolution of the NW Iberia are especially well exposed along the eastern rim of this first order structure, where this research work was achieved. Two major tectono-stratigraphic domains juxtaposed by a significant Variscan tectonic accident were redefined: the Schistose Domain of Galicia Trás-os-Montes (SDGTM) and Central Iberian Zone (CIZ). The first domain belongs to the lowermost tectonic slice of the different imbricated allochthonous units of the GTMZ. The SDGTM was settled over the CIZ during the Variscan C2 stage by the Main Trás-os-Montes Thrust (MTMT), and it is considered to be the least allochthonous unit (also called Parautochthonous or Peritransmontano Domain). Since the pre-variscan stratigraphic records of both domains are very similar, it is assumed that they must have been attached to the same continental margin but in different palaeogeographic locations, as their detrital zircon age populations point out. Both domains present a quite continuous and traceable Cambro-Silurian (?) stratigraphic sequence, although it underwent more Variscan deformation in the SDGTM than in its relative autochthonous (CIZ). In the CIZ the identification of two ichnofossil genera in the Desejosa Formation (Teichichnus rectus and Rosselia socialis) confirms that its upper part is at least uppermost-early Cambrian (Cambrian Stage 3), as previously proposed near the studied region with badly preserved trilobite remains (522Ma). A new stratigraphic unit (Montes Ermos formation, informal) was found concordantly overlaying the Desejosa Formation and lying below the Lower Ordovician unconformity (or Toledanic Unconformity) meaning that the uppermost record of the Slate and Greywacke Complex in Iberia could reach ages younger than Cambrian Stage 3. Over the Toledanic uncon…
author: Silva, Ícaro Fróis Dias da
keywords: Academic dissertations, Geology, Structural, Geology, Stratigraphic, Petroleum -- Geology, Tesis y disertaciones académicas, Universidad de Salamanca (España), Tesis Doctoral, Geología estructural, Estratigrafía, Petróleo, Geología
date published: 2013
date modified: 2026-07-27T21:01:13Z
provider: Universidad de Salamanca
publisher: Networked Digital Library of Theses and Dissertations
type: WebPage
source organization: Universidad de Salamanca

PropertyValue
property ID: DOI
value: 10.14201/gredos.121357