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Figure 6. Left. Composite lithostratigraphic column of the sedimentary fill (Neogene carbonate sediments) of Apostoli Basin.
Right. Photomicrographs of the Rethymnon Limestones. A,B. Rhodalgal-type lithofacies. C,D. Echinofor-type lithofacies.
(A) Rhodalgal-type lithofacies. Floatstone with coralline algae in the form of in-situ developed rhodoliths. Rhodoliths are characterized by concentric structure. On the right is an abraded fragment of coralline algae. The matrix is a bioclastic packstone rich in benthic foraminifers, echinoderms, and fragments of coralline algae.
(B) Bryozoan partially encrusted by coralline algae. Intraparticle pores are surrounded by a thin generation of scalenoedric cement, the remaining space remained open or filled by blocky cement.
(C) Echinofor-type lithofacies. Floatstone (bio-micrudite) with abundant echinoderms and large benthic foraminifers. Coralline algae occur as well.
(D) Floatstone (biomicrudite) with abundant large benthic foraminifers (Heterostegina sp.) dispersed in a bioclastic matrix rich in small benthic foraminifers and echinoderms. Large benthic foraminifers show a tendency toward parallel orientation.