Carbonates and Evaporites

, Volume 8, Issue 1, pp 1–8 | Cite as

Modern ooids of Cleopatra Beach, Gokova (South Aegean Sea) Turkey: Results from petrographyand scanning electron microscopy

  • Suayip Üsenmez
  • Baki Varol
  • Gerald M. Friedman
  • Erdogan Tekin
General Papers


Modern ooids from the Cleopatra Beach on Island in the Gökova Bay, South Aegean Sea, resemble ooids formed on the Bahamian platform. The concentric coatings of the ooids consist of two or more laminae around a carbonate- or non-carbonate nucleus. The oolite cortex is transparent, whereas the non-transparent portions seem to be the dark fields on the oolitic surfaces. The ooids are mixed with molluscan skeletal debris displaying micritic envelopes. Weakly consolidated ooids have been cemented by calcite in the form of meniscus cement.

According to electron-microscope studies, three kinds of crystal shapes have been distinguished, as follows:
  1. 1-

    Micronodules attributed to microboring organisms such as cyanobacteria or coccoids;

  2. 2-

    Tablet-shaped crusts of hemispheres; likely produced by bacterial activity,

  3. 3-

    Acicular- or elongate crystals precipitated directly from sea water in vacated holes of the microborings or as of the tangentially orientated parts of the ooids.


Algal- and bacterial processes are thought to have been main sources of the carbonate that was precipitated to form the ooids.


Ooids Calcite Crystal Oolite Sedimentary Petrology Micrite Envelope 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer 1993

Authors and Affiliations

  • Suayip Üsenmez
    • 1
  • Baki Varol
    • 2
  • Gerald M. Friedman
    • 3
    • 4
  • Erdogan Tekin
    • 2
  1. 1.Faculty of Engineering and ArchitectureGazi UniversityAnkaraTurkey
  2. 2.Faculty of Science, Department of Geological EngineeringAnkara UniversityAnkaraTurkey
  3. 3.Department of GeologyBrooklyn College and Graduate School of the City University of New YorkBrooklyn
  4. 4.The Northeastern Science Foundation, Inc. affiliated with Brookly College-CUNYRensselaer Center of Applied GeologyTroy

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