Palaeoecological and sedimentological characteristics of the Lower Tortonian scleractinian reef corals of Gavdos Island, southern Greece

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• 作者：Fotini Pomoni ; Hara Drinia ; Nikolaos Tsaparas
• 关键词：Coral reefs ; Microfacies analysis ; Depositional environment ; Tortonian ; Miocene ; Gavdos Island ; Mediterranean
• 刊名：Geobios
• 出版年：2013
• 出版时间：May-June, 2013
• 年：2013
• 卷：46
• 期：3
• 页码：233-241
• 全文大小：4271 K

文摘

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 ¡ãC. 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.