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In the northwestern part of the Arabian Platform, the Adıyaman district (SE Turkey) displays some Lower-Middle Cenomanian deep-marine sediments of the Derdere Formation. These sediments are yielding abundant echinodermal remains, among which some thecal and brachial plates are assignable to roveacrinids. Routine microfacies analysis of the Lower-Middle Cenomanian part of the Derdere Formation revealed...
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