4. Temperate and Tropical Carbonatesedimentation Episodes in the Neogene Betic Basins (Southern Spain) Linked to cLimatic Oscillations and Changes in Atlantic-Mediterranean Connections: Constraints from Isotopic Data

  1. Maria Mutti3,
  2. Werner Piller4 and
  3. Christian Betzler5
  1. José M. Martín1,
  2. Juan C. Braga1,2,
  3. Isabel M. Sánchez-Almazo2 and
  4. Julio Aguirre1

Published Online: 3 APR 2012

DOI: 10.1002/9781118398364.ch4

Carbonate Systems during the Oligocene-Miocene Climatic Transition

Carbonate Systems during the Oligocene-Miocene Climatic Transition

How to Cite

Martín, J. M., Braga, J. C., Sánchez-Almazo, I. M. and Aguirre, J. (2012) Temperate and Tropical Carbonatesedimentation Episodes in the Neogene Betic Basins (Southern Spain) Linked to cLimatic Oscillations and Changes in Atlantic-Mediterranean Connections: Constraints from Isotopic Data, in Carbonate Systems during the Oligocene-Miocene Climatic Transition (eds M. Mutti, W. Piller and C. Betzler), Wiley-Blackwell, Oxford, UK. doi: 10.1002/9781118398364.ch4

Editor Information

  1. 3

    Institut für Erd- und Umweltwissenschaften Universität Potsdam, Postfach 60 15 53 D-14415 Potsdam, Germany

  2. 4

    Institute for Earth Sciences (Geology & Paleontology) University of Graz, Heinrichstrasse 26, A-8010 Graz, Austria

  3. 5

    Geologisch-Palaeontologisches Institut, Bundesstr. 55, D-20146 Hamburg, Germany

Author Information

  1. 1

    Departamento de Estratigrafía y Paleontología, Facultad de Ciencias, Universidad de Granada, Campus de Fuentenueva s.n., 18002 Granada, Spain

  2. 2

    Centro Andaluz de Medio Ambiente (CEAMA), Avenida del Mediterráneo s/n, 18006 Granada, Spain

Publication History

  1. Published Online: 3 APR 2012
  2. Published Print: 5 APR 2012

Book Series:

  1. Special Publication Number 42 of the International Association of Sedimentologists

Book Series Editors:

  1. Ian Jarvis6,7

Series Editor Information

  1. 6

    School of Geography, Geology and the Environment Centre for Earth and Environmental Science Research, Kingston University London, UK

  2. 7

    Penrhyn Road, Kingston upon Thames KT1 2EE, UK

ISBN Information

Print ISBN: 9781444337914

Online ISBN: 9781118398364

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Keywords:

  • Temperate carbonates;
  • tropical carbonates;
  • stable isotopes;
  • Atlantic-Mediterranean connections;
  • Neogene basins;
  • Betic Cordillera

Summary

Marine, shallow-water carbonate units composed of heterozoan (temperate) and photozoan (tropical) associations alternate in the Upper Miocene–Lower Pliocene record of the Betic intermontane basins. Heterozoan carbonates appear in the Early Tortonian, latest Tortonian–earliest Messinian, and in the Zanclean. Photozoan carbonate formation took place in the earliest Tortonian, Late Tortonian, and in the Messinian. Heterozoan carbonates consist of bioclastic limestones with bryozoans, coralline algae and bivalves as major components. Hermatypic corals and calcareous green algae were the principal components in the photozoan carbonates. Fossil assemblages and stableisotope analyses suggest that sea-surface water-temperature variations controlled the types of carbonates formed. During the Late Miocene, heterozoan carbonates accumulated on ramps in the cold stages of third-order eustatic cycles, during sea-level lowstands, while photozoan carbonates formed on shelves in warm periods, during rising and high sea levels. In the Early Pliocene, a significant change in the Atlantic- Mediterranean connections took place with the closure of the Rifian Straits and the opening of the Gibraltar Straits. A new current pattern for the western Mediterranean was implemented with temperate surface waters flowing into the Mediterranean Sea from a more northern, cooler source area. This new situation probably caused the disappearance of coral reefs in the Mediterranean Pliocene, and favoured the widespread development of heterozoan carbonates on shelves. This regional cooling is in contrast to the subtle global warming recorded in the open oceans during the Early Pliocene.