8. Facies and Stratigraphic Architecture of a Miocene Warm-Temperate to Tropical Fault-Block Carbonate Platform, Sardinia (Central Mediterranean Sea)

  1. Maria Mutti3,
  2. Werner Piller4 and
  3. Christian Betzler5
  1. Merle-Friederike Benisek1,
  2. Gabriela Marcano2,
  3. Christian Betzler1 and
  4. Maria Mutti2

Published Online: 3 APR 2012

DOI: 10.1002/9781118398364.ch8

Carbonate Systems during the Oligocene-Miocene Climatic Transition

Carbonate Systems during the Oligocene-Miocene Climatic Transition

How to Cite

Benisek, M.-F., Marcano, G., Betzler, C. and Mutti, M. (2012) Facies and Stratigraphic Architecture of a Miocene Warm-Temperate to Tropical Fault-Block Carbonate Platform, Sardinia (Central Mediterranean Sea), 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.ch8

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

    Geologisch-Paläontologisches Institut der Universität Hamburg, Bundesstr. 55, D-20146 Hamburg, Germany

  2. 2

    Universität Potsdam, Institut für Geowissenschaften, Karl-Liebknecht-Strasse 24, Haus 25, D-14476 Golm, Germany

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:

  • Miocene;
  • carbonate platform;
  • coralline red algae;
  • Northern Sardinia;
  • Mediterranean Sea

Summary

A Miocene (Burdigalian) carbonate platform in Northern Sardinia was studied in order to unravel its facies and stratigraphic architecture. The Sedini Limestone unit formed at the western margin of the Pèrfugas sub-basin on a fault-bounded topographic high. The 10–60 m sedimentary succession contains two depositional sequences separated by a major erosional unconformity, and several high-frequency sequences reflecting the occurrence of higher-order base-level fluctuations. The deposits are massive limestones, bedded limestones and marlstones, which form a carbonate platform with an extension of about 19km2. Sequence 1 consists of a homoclinal ramp with beaches, minor patch reefs, longshore bars, and finer-grained outer-ramp sediments. Sequence 1 deposits were formed by a warm temperate carbonate factory with abundant coralline algae, frequent larger benthic foraminifera (Heterostegina, Amphistegina, Borelis), barnacles, bryozoans, molluscs, and minor corals. Sequence 2 documents a steepening of the carbonate platform slope. In the lower part of this sequence, a belt of submarine dunes separated the platform-interior from deeper water bioclastic deposits. Dunes were locally stabilized by coralline algal bindstones. In the upper part of Sequence 2, the depositional system consisted of an extensive reef flat with a marked slope break formed by coralline algal bindstones and rhodolithic clinoform beds dipping at up to 27°. The carbonate factory of Sequence 2 is rich in reef-building zooxanthellate corals and therefore can be unequivocally assigned to a tropical carbonate factory. Spectacular outcrops in the Sedini Limestone unit allow a detailed observation of the facies, the bedding geometries, and the stratigraphic architecture of carbonates formed at the transition from the temperate to the tropical realm.