Microfacies and biostratigraphy of an Upper Triassic Dachstein limestone fore-reef block in the Jurassic Sirogojno carbonate-clastic Mélange (Zlatibor Mt., SW Serbia)

In the late Middle to early Late Jurassic carbonate-clastic Sirogojno Melange in Zlatibor Mountain there is one roughly 35 m thick overturned block with an intact Triassic fore-reefal Dachstein Limestone succession studied for its biostratigraphic age, content and microfacies characteristics. The starts coarse-grained rudstones followed by meter-sized reefal blocks intercalated partly layered resedimented grainstones packstones abundant reef-building organisms like calcareous sponges, corals encrusting organisms. Inside this part of open-marine influenced layers are rare. continues a turbiditic sequence chaotic rudstones, densely packed reef-derived material broken reefbuilding shallow-water gastropods, bivalves foraminifers. Grainstones clear influence (e.g., thin-shelled bivalves, crinoids, conodonts) appear between those cases lumachelle be composed halobiids were deposited. To end some show bedding mixed deep-marine grains organisms, i.e. filaments crinoids. On base conodonts, foraminifers, algae, holothurians throughout whole succession, middle Norian (Alaunian) Rhae tian 1, most probably (Sevatian) age can assigned similar sedimentation pattern fore-reef limestone facies, e.g., Northern Calcareous Alps or eastern Southern Alps. study closes important gap knowledge about extent, facies stratigraphy Carbonate Platform evolution Dinarides.