General investigation into Upper Paleozoic sedimentary environment in southern Central Iran

A thick sequence of Paleozoic rocks in Central Iran with special characteristic s has been investigated . This corresponds to some other regions in Iran. The aim of this research is to investigate several facies of the Paleozoic in the southern part of Central Iran containing supertidal, intertidal and lagoon facies carbonates that are found in a rid climate, Similar to the southern Persian Gulf and west Australian coast and sand stone , b lack and red shale, siltstone and conglomerate of terrigenous facies . Based on Widely extended sands tone layer s and the existence of dolomitic layers in the top o f terrigenou s sequence , we suggest the existence of a littoral environment with slow subsidence for formationof these layer s . Black shales a re found in the end of delta environments and small is lands existing between braded channels. With increase of energy, siltstones and sandstones were formed between black shales layers . Red shales accompanied with silts tones and tiny to grain y sandstones Indicate continental tropical weather. The conglomerate layer on the paleorelief represents an off lap stage and an orogenic phase . In the sedimentary environment of the above mentioned sequence , based on the existence of different faun a. special lithologic and sedimentary structures, there can be ecognized marine facies, containing littoral , intertidal, lagoon . bioclastic bar, reef and sandy bar , and continentalfacies , containing braided river channels and point bar.This study demonstrates that Upper Devonian sediments were laid above the sands tone and quartzite layers, like in other regions ill Central Iran. and we re deposited chronologically at the Pre-Middle Frasnian