75598 20190709135453.0 doi 10.1016/j.sedgeo.2017.04.007 sideral 98970 ART-2017-98970 eng (orcid)0000-0001-8777-6984 Val, J. Universidad de Zaragoza Cyclostratigraphy and chemostratigraphy of a bioclastic storm-dominated carbonate ramp (late Pliensbachian, Iberian Basin) 2017 Access copy available to the general public Unrestricted Deposition of regressive successions and coeval positive trend in the oxygen stable isotope record in relatively deep marine successions of the upper Pliensbachian of western European basins have been related to a cooling interlude within the warm greenhouse conditions of the Pliensbachian. Sedimentological, cyclostratigraphic and chemostratigraphic analyses carried out in two upper Pliensbachian successions exposed in the Iberian Chain (Obón and San Pedro localities, Spain) allowed the characterization of the imprint of this cooling interlude on the relatively shallow areas of the Iberian carbonate ramp. The upper Pliensbachian succession is characterized by skeletal limestones and encompasses proximal mid-ramp to proximal outer-ramp facies, in which resedimentation and reworking by storm-induced flows controlled the accumulation of bioclastic debris. Two orders of high-frequency, metre-scale sequences have been identified: bundles of beds, and deepening-shallowing sets of bundles. According to the age calibration (previous biostratigraphic data and new strontium isotopes data) and correlation with nearby sections, these sequences are suggested as formed in tune with the short-term and long-term eccentricity Milankovitch cycles. The isotopic data from brachiopod shells and belemnite rostra indicate progressively increasing d18O and slightly decreasing d13C trends for the uppermost Pliensbachian Spinatum Zone, reflecting the influence of cooling conditions. However, facies analysis reflects that the expected coeval long-term regression was interrupted by a tectonically driven transgressive event in the uppermost part of the Spinatum Zone. info:eu-repo/grantAgreement/ES/DGA/H54-Grupos Consolidados info:eu-repo/grantAgreement/ES/MINECO/CGL2014-53548-P info:eu-repo/semantics/openAccess by-nc-nd http://creativecommons.org/licenses/by-nc-nd/3.0/es/ 2.575 2017 GEOLOGY 9 / 47 = 0.191 2017 Q1 T1 1.277 2017 Stratigraphy 2017 Q1 Geology 2017 Q1 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion (orcid)0000-0003-1112-524X Bádenas, B. Universidad de Zaragoza (orcid)0000-0002-2430-7424 Aurell, M. Universidad de Zaragoza Rosales, I. 2000 280 Universidad de Zaragoza Dpto. Ciencias de la Tierra Área Estratigrafía 355 (2017), 93-113 Sediment. geol. SEDIMENTARY GEOLOGY 0037-0738 3742421 http://zaguan.unizar.es/record/75598/files/texto_completo.pdf Postprint 37843 http://zaguan.unizar.es/record/75598/files/texto_completo.jpg?subformat=icon icon Postprint oai:zaguan.unizar.es:75598 articulos driver 2019-07-09-11:42:08 ARTICLE