Lower Aptian ammonite and carbon isotope stratigraphy in the eastern Prebetic Domain (Betic Cordillera, southeastern Spain) Moreno-Bedmar, Josep Anton Company Sempere, Miguel Sandoval, J. Tavera, J. M. Bover-Arnal, T. Salas, Ramón Delanoy, Gerard Maurrasse, Florentin Martínez, Ricard Ammonites Lower Aptian OAE 1a Biostratigraphy Prebetic Domain Southeastern Spain Major global palaeobiologic and palaeoenvironmental changes occurred during the Early Aptian. Precise dating and timing of the different events is crucial to determine possible cause-effect relationships between them. In this regard, the combination of biostratigraphic and chemostratigraphic data can provide a very useful tool for time control. So far attempts to correlate the Lower Aptian carbon isotope record and the ammonite zonation yielded contradictory conclusions. In this paper, we present the results of an integrated analysis of the ammonite stratigraphic distribution and highresolution carbon isotope profiles from Lower Aptian sections of the eastern Prebetic Domain (Betic Cordillera, southeastern Spain). We recognized, in ascending order, the Deshayesites oglanlensis, Deshayesites forbesi, Deshayesites deshayesi, and Dufrenoyia furcata Zones. This succession is the same as that recently identified in the eastern Iberian Chain, and it closely correlates with both standard Mediterranean and Boreal zonations. The carbon isotope record displays the trends globally recognized for the Early Aptian, with two long positive shifts separated by a pronounced negative excursion. Calibration of this isotopic record with the ammonite zonation shows that the age of OAE 1a, which corresponds to the negative excursion and subsequent positive shift, is constrained to the middle/upper part of the Deshayesites forbesi Zone. 2014-06-03T07:17:45Z 2014-06-03T07:17:45Z 2012 info:eu-repo/semantics/article Moreno-Bedmar, J.A.; et al. Lower Aptian ammonite and carbon isotope stratigraphy in the eastern Prebetic Domain (Betic Cordillera, southeastern Spain). Geologica Acta, 10(4): 333-350 (2012). [http://hdl.handle.net/10481/32087] 1695-6133 1696-5728 http://hdl.handle.net/10481/32087 10.1344/105.000001752 eng http://creativecommons.org/licenses/by-nc-nd/3.0/ info:eu-repo/semantics/openAccess Creative Commons Attribution-NonCommercial-NoDerivs 3.0 License Universidad de Barcelona; Instituto de Ciencias de la Tierra Jaume Almera