Palaeoecological and sedimentological characteristics of the Lower Tortonian scleractinian reef corals of Gavdos Island, southern Greece - 11/07/13
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 50m 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.
Le texte complet de cet article est disponible en PDF.Keywords : Coral reefs, Microfacies analysis, Depositional environment, Tortonian, Miocene, Gavdos Island, Mediterranean
Plan
☆ | Corresponding editor: Frédéric Quillévéré. |
Vol 46 - N° 3
P. 233-241 - mai 2013 Retour au numéroBienvenue sur EM-consulte, la référence des professionnels de santé.
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