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Continue to ChatA composite biostratigraphy (mainly calpionellids and foraminifera) of the Upper Jurassic–Lower Cretaceous Carbonates in Sivrihisar region (Pontides, NW Turkey): Delineation of the J-K boundary in a slope environment - https://avesis.metu.edu.tr/yayin/8b58fe7d-4e90-453b-8560-839314285de3/a-composite-biostratigraphy-mainly-calpionellids-and-foraminifera-of-the-upper-jurassiclower-cretaceous-carbonates-in-sivrihisar-region-pontides-nw-turkey-delineation-of-the-j-k-boundary-in-a-slope-environment