Palaeoenvironmental Changes and C-Isotope Stratigraphy in the Alarcón Formation Stratotype (Upper Cenomanian–Lower Coniacian), Iberian Ranges, Spain
This study analyses the sedimentary facies, palaeosols, and δ13C stratigraphy of the Alarcón Formation in its stratotype in the Iberian Ranges (Spain). The aim is to characterize the palaeoenvironmental changes that occurred in the shallow-marine carbonate environments of central Iberia during the late Cenomanian to early Coniacian. These changes, recorded in seven transgressive–regressive cycles, are interpreted in the framework of regional sea-level variations, local subsidence, and climate. The possible influence of supraregional changes, such as those related to Oceanic Anoxic Event 2 (OAE2), on the sedimentary succession of the Alarcón Formation is also analysed and discussed.
KeywordsShallow-marine carbonates Palaeosol Stable isotopes Upper Cretaceous Iberian ranges Cenomanian–Turonian
We acknowledge projects UJA-07-16-41 and CGL2011-24546 and research groups RNM-200 and UCM-910198. Comments by the Congress Scientific Committee on this abstract are greatly appreciated.
- Vilas, L., Mas, J. R., García, A., Arias, C., Alonso, A., Meléndez, N., et al. (1982). Ibérica Suroccidental. In A. García (Ed.), El Cretácico de España (pp. 457–514). Madrid: Universidad Complutense Madrid.Google Scholar