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STRATI 2013 pp 205-208 | Cite as

Cyclostratigraphy of a Tithonian–Valanginian Carbonate Ramp Succession, Southern Mendoza, Argentina: Implications for the Jurassic–Cretaceous Boundary in the Neuquén Basin

  • Diego A. KietzmannEmail author
  • Ricardo M. Palma
Conference paper
  • 108 Downloads
Part of the Springer Geology book series (SPRINGERGEOL)

Abstract

We conducted detailed sedimentological, sequence-stratigraphic, and cyclostratigraphic analyses on four sections of the Vaca Muerta Formation. This unit is characterized by a decimetre-scale rhythmic alternation of marls and limestones. It consists of five facies associations, which represent basin to middle carbonate ramp deposits. The rhythmic vertical organization shows a well-ordered hierarchy of cycles, where elementary cycles, bundles of cycles, and superbundles within the Milankovitch frequency band are recognized. Cyclostratigraphic data allowed us to build a floating orbital scale for the lower Tithonian–lower Valanginian interval in the Neuquén Basin. Orbital calibration of these sections is consistent with Riccardi’s biostratigraphic scheme, which places the Jurassic–Cretaceous boundary within the Substeueroceras koeneni ammonite Zone (equivalent to Durangites spp., Jacobi/Grandis, and initial Occitanica standard zones).

Keywords

Orbital cycles Milankovitch Biostratigraphy Jurassic–Cretaceous boundary 

References

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Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  1. 1.IDEAN-CONICET, Departamento de Ciencias Geológicas, Facultad de Ciencias Exactas y NaturalesUniversidad de Buenos AiresBuenos AiresArgentina

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