--> Early Carboniferous bivalve pavements from the Northern Arabian mixed carbonate-siliciclastic platform edge in the Zap Valley bioata (SE Turkey) with Kulm affinities

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Early Carboniferous bivalve pavements from the Northern Arabian mixed carbonate-siliciclastic platform edge in the Zap Valley bioata (SE Turkey) with Kulm affinities

Abstract

The Middle Devonian-Early Carboniferous Zap Group exposed in southeastern Turkey was deposited in a shallow marine environments at the edge of the northern Arabian Platform facing the Paleotethys. A study of thin shelled-bivalve pavements which consitute the Septimyalina horizon occur in a distinctive black shale and mudstone units in the middle part of a Lower Carboniferous mixed carbonate-siliciclastic deposits, of the southern Turkey. Carboniferous shell beds range from mm-thick pavements are characterized by laminated mudstone and fissile, dark grey claystone, yielding abundant bivalve pavements with monospecific myalinid assemblages dominated by Septimyalina, an edgewise recliners, shallow-epifaunal pterioids bivalve. Up to now, this genus was known only from Europe and NW Turkey (Zonguldak Coal Basin). Most of the European Carboniferous myalinids are known from Kulm facies. A new locality with Carboniferous myalinids was found at Hakkari (SE Turkey) from the Northern Arabian Plate, Zap Valley bioata, and about 100 specimens have been collected. The monospecific myalinid assemblage is definitely autochthonous; practically all the specimens have articulated valves without signs of transportation and/or re-sedimentation.