Geological similarity between Hercynian zones from Brittany and the Iberian Peninsula has led various authors [l-31 to propose that these zones were once continuous. Bard et ai. [3], for example, reconstmct the Hercynian 1bero.Armorican belt to find the position of the Iberian peninsula before the opening of the Bay of Biscay (1 50 to 200 my ago). They assume continuity of Hercynian structures ...

A large anatectic complex of Hercynian age, the Peña Negra complex, crops out in the central-north area of the Sierra de Gredos, Avila batholith, central Spain. Migmatites and anatectic granitic rocks were generated during the Upper Carboniferous from a Neoproterozoic – Lower Cambrian schist–greywacke complex with minor interlayered orthogneisses. Granitic rocks appear as subhorizontal sheets o...

Devonian and Carboniferous paleoArmorican to the central European Variscan strucmagnetic data from the European Hercynides show a rural trend (Figure 1) and its potential imporcoherent pattern in inclination but significant tance for geodynamics is only one aspect of this dispersion in declination. The declination anomaplate tectonic enigma. The bending around the Bay lies with respect to expec...

A thrust-fold belt consisting of a series thrusts and buckling folds developed in the Mesozoic Cenozoic strata within Kuqa Depression, Tarim Basin. In this study, structural interpretation model Depression is established proto-basin reconstructed on basis outcrop geology along basin margin, seismic, well-log CEMP data. The called ‘delaminate contractional deformation’, which emphasizes decoupli...

The tectonic map at scale 1:1,750,000 presented in this work shows an update of the existing knowledge main and volcanic structures along Iberian continental margins abyssal plains. morphotectonic trends around Iberia recorded superposed geodynamic processes linked to opening North Atlantic Ocean since Mesozoic evolution Mediterranean Sea during Cenozoic, as well reactivation Hercynian faults f...

In order to obtain a Lower Palaeozoic pole for the Armorican Massif and to test the origin of the Ibero-Armorican arc, the Ordovician dolerites of the Crozon peninsula have been palaeomagnetically studied. The samples show a multicomponent magnetization which has been revealed by AF and thermal demagnetization and thoroughly investigated with rock magnetic experiments, polished section examinat...