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Submarine limestones in the nearshore environment off Kuwait, Northern Arabian Gulf

  • Author(s): Druffel, ER
  • Khalaf, F
  • Milliman, JD
  • Druffel, ER
  • et al.
Creative Commons 'BY' version 4.0 license
Abstract

Even with careful petrographic and mineralogic characterization of marine limestones, intertidally and subtidally lithified rocks are often difficult to differentiate, thus hindering an accurate delineation of the diagenetic environment. Limestones from water depths of 6 to 8 m off Kuwait vary in petrographic character from oosparite and biosparite (in which the cement is entirely aragonite) to oomicrite and biomicrite (in which at least some of the cement is microcrystalline magnesian calcite). Carbon-14 dates suggest that the oosparite may have lithified at depths shallower than at present (possibly intertidally) during a lower stand of sea-level. In contrast the biosparite, oomicrite and biomicrite appear to be contemporaneous and to have lithified subtidally.

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