Palaeoecological and sedimentological characteristics of the Lower Tortonian scleractinian reef corals of Gavdos Island,southern Greece |
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Authors: | Fotini Pomoni Hara DriniaNikolaos Tsaparas |
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Institution: | National and Kapodistrian University of Athens, Faculty of Geology and Geoenvironment, Panepistimiopolis, 157 84 Athens, Greece |
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Abstract: | Early Late Miocene coral assemblages from five outcrops of Gavdos Island, Southern Greece, are investigated with respect to their palaeoecological implications. Small patch reefs with Porites assemblage are a common feature of the low-diversity coral occurrences. The determined hermatypic colonies indicate a nearshore palaeoecosystem prevailing in a tropical to subtropical coastal sea at depths ranging from 5 to 50 m with an average temperature of 22–26 °C. Microfacially, the studied Scleractinian patch reefs are represented by Coral Framestones-Floatstones. The reefal facies has been affected by syndepositional processes (boring activities-micritization), as well as by post-depositional diagenesis in the meteoric realm (dissolution, cementation and intense pedogenesis). The palaeoecological and sedimentological analysis indicates a restricted to open-marine inner platform setting of moderate to high energy, possibly of ramp-type (inner-mid ramp). Coral reef growth took place mainly during stages of accommodation (i.e., transgressive episode, cycle 3.1 of Vail curve) and of relatively low siliciclastic input. |
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Keywords: | Coral reefs Microfacies analysis Depositional environment Tortonian Miocene Gavdos Island Mediterranean |
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