70590 20200221144349.0 doi 10.1016/j.sedgeo.2016.05.009 sideral 97053 ART-2016-97053 eng (orcid)0000-0002-9130-117X Liesa, C. L. Universidad de Zaragoza Facies control on seismites in an alluvial–aeolian system: the Pliocene dunefield of the Teruel half-graben basin (eastern Spain) 2016 Access copy available to the general public Unrestricted The recognition of seismically induced soft-sediment deformation structures (SSDS) in sedimentary successions characterized by different facies, and hence by different rheology, is challenging. This is the case for high porosity and high permeability aeolian facies interbedded with muddy wet interdune deposits and alluvial conglomerates and sandstones. Several types of SSDS have been studied in two exposures of the Upper Pliocene (2.9–2.6 Ma) sediments of a fault-bounded intracontinental aeolian dune field in the Teruel Basin (Iberian Chain, eastern Spain). Among SSDS, load and fluid-escape structures, apart from several animal tracks, have been recognized. Those structures show an irregular distribution through the studied stratigraphic sections, being scarce in homogenous aeolian sands and frequent in water-related facies. A detailed study of the distribution and geometry of SSDS and their relationships with respect to the stratigraphic architecture and facies has allowed a critical discrimination of trigger mechanisms, i.e. biological or physical overloading vs. earthquakes. The seismically induced structures are concentrated into seven deformed beds, showing an uneven lateral distribution and geometry closely controlled by the hosting sedimentary facies and their rheology. These seismites resulted from liquefaction during moderate earthquakes (estimated magnitude from 5.0 to 6.8). The most probable seismogenic source was the Sierra del Pobo normal fault zone, located 2 km to the East. Results show how an appropriate recognition of sedimentary facies is crucial to understand the lateral variability of seismites in sedimentary environments characterized by sharp facies changes. info:eu-repo/grantAgreement/ES/MINECO/CGL2011-30153-C02-02 info:eu-repo/grantAgreement/ES/MINECO/CGL2012-35662 info:eu-repo/semantics/openAccess by-nc-nd http://creativecommons.org/licenses/by-nc-nd/3.0/es/ 2.373 2016 GEOLOGY 10 / 47 = 0.213 2016 Q1 T1 1.129 2016 Stratigraphy 2016 Q1 Geology 2016 Q1 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion Rodríguez-López, J. P. (orcid)0000-0003-0900-1440 Ezquerro, L. Alfaro, P. Rodríguez-Pascua, M. Á. Lafuente, P. (orcid)0000-0001-5091-9398 Arlegui, L. Universidad de Zaragoza (orcid)0000-0003-1412-5245 Simón, J. L. Universidad de Zaragoza 2000 428 Universidad de Zaragoza Dpto. Ciencias de la Tierra Área Geodinámica Interna 344 (2016), 237-252 Sediment. geol. Sedimentary Geology 0037-0738 1347866 http://zaguan.unizar.es/record/70590/files/texto_completo.pdf Postprint 9149 http://zaguan.unizar.es/record/70590/files/texto_completo.jpg?subformat=icon icon Postprint oai:zaguan.unizar.es:70590 articulos driver 2020-02-21-13:54:18 ARTICLE