مطالعه گسترش چينه شناسي فرامينيفرا بنتونيك سازند قم در غرب ساوه

A Study of Stratigraphic Distribution of Benthonic Foraminifera From Qom Formation in West Saveh

In this study, the sediments of Qom Formation was investigated in one stratigraphical section in west of Saveh (Kohlu Paein Section). The thickness of Q6m Formation in Kohlu Paein Section measured 500 m. and it mainly consists of shale, marl, sandstone, sandy limestone and limestone. In this section, the sediments of Qom Formation disconformably lie between Lower Red Formation at the base, and Upper Red Formation at the top. The study of 102 samples taken from the studied section led to the identification of 26 genera and 29 species of benthonic foraminifera , 2 genera and 3 species of planktonic foraminifera, 2 genera and species of red algae and 2 genera and species of bryozoa . Among them, benthonic foraminifera has more variety and abundance. So, the benthonic foraminifera of the measured section were used to recognize the age of succession and justify their correlation. Based on the recognized foraminifera such as Borealis melo curdica, Dendritina rangi, Peneroplis evolutus, Meandropsina iranica, the Kohlu Paein section is comparable to biozonation introducted by Adams & Bourgeois (1967). It is analogous to Borelis melo group - Meandropsina iranica Assemblage Zone (1). According to distribution of the index foraminifera, the age of the sediments in Kohlu Paein section is Burdigalian .