Palynomorph-based paleoenvironmental implications of upper part of the Chamanbid Formation at the type section

The upper part of the Chamanbid Formation at the type section was studied for determination of paleoenvironmental changes by using palynomorphs and organic matter contents. Diverse and reasonably well preserved palynomorphs recorded in many samples. The upper part of the Chamanbid Formation consists of calcareous shale and limestone (ca. 240 m thick). Of 34 rock samples collected, 30 proved to be palynologicaly productive containing proximate dinoflagellate cysts, spores, pollen, foraminiferal test lining, SOM and wood debris which statically studied. Abundance of non-mature bladed form large brown wood debris, bright SOM, foraminiferal test linings and few numbers of proximate dinocysts indicate that the upper part of the formation deposited in a lagoon that witnessed intermittent marine incursions.Key words: