RT Journal Article T1 Unidades Preordovícicas y Megaestructuras Cadomienses en La Serena y La Siberia Extremeña (Macizo Ibérico meridional) T1 Pre-Ordovician units and Cadomian megastructures of La Serena and La Siberia Extremeña(Southern Iberian Massif) A1 Apalategui, Octavio A1 Eguiluz, Luis A1 Martínez Torres, Luis M. A1 Palacios Medrano, Teodoro AB New mapping of the pre-Ordovician basement (Schist and Greywacke Complex or Lower Alcudian)from the La Serena and La Siberia Extremeña regions of the southern Central Iberian zone has allowed thedistinction of up to four independent stratigraphic units. The studied sequence is exposed in twomegastructures: the Almorchón-Valdecaballeros Antiform and the Cerro de los Moros Synform, separatedby the Patin Fault, which seems to correspond to an ancient paleogeographic boundary. The continuity ofthese structures under the Paleozoic synclines and the sub-orthogonal directions with respect to those ofthe Variscan cover is regarded as an evidence for deformational events related to the Cadomian (pan-African) cycle, likely in connection to those recorded in the adjacent Ossa-Morena Zone YR 2009 FD 2009 LK http://hdl.handle.net/10272/7999 UL http://hdl.handle.net/10272/7999 LA spa DS Repositorio Institucional de la Universidad de Huelva RD 30 may 2026