نتایج جستجو برای: orbitolina

تعداد نتایج: 23  

Journal: :geopersia 2011
morteza taherpour khalilabad ali asghar aryaei alireza ashouri abbas ghaderi

a stratigraphic section from the tirgan formation was selected in arkan village nearby bojnourd city in order to study echinoderm fauna systematically. many specimens of echinoderms, especially toxasteridae which is associated with brachiopods were collected and studied systematically in this paper. microscopie slides were also prepared and studied. all slides contain benthic foraminifers and c...

Journal: Geopersia 2011
Abbas Ghaderi Ali asghar Aryaei Alireza Ashouri Morteza Taherpour Khalilabad

A stratigraphic section from the Tirgan Formation was selected in Arkan village nearby Bojnourd city in order to study echinoderm fauna systematically. Many specimens of echinoderms, especially toxasteridae which is associated with brachiopods were collected and studied systematically in this paper. Microscopie slides were also prepared and studied. All slides contain benthic foraminifers and c...

Journal: :Geological field trips 2022

The Apennine Carbonate Platform of southern Italy witnesses nearly 150 Myr (Late Triassic to Late Cretaceous) shallow-water carbonate sedimentation in the subtropical central Tethys. During this field trip, you will have a look at stratigraphy and facies across some key intervals global palaeoenvironmental perturbation important stratigraphic discontinuities history platform.During first day, v...

Two stratigraphic sections (Kuh-e-Rahmat and Kuh-e-Sabz) of Upper Cretaceous strata in the Interior Fars region (SW of Iran) were selected. Lower Cretaceous succession of Kuh-e-Rahmat was consisted of Dariyan, Kazhdumi Sarvak and Ilam Formations. The lower contact of the Sarvak Formation with Kazhdumi Formation is described as a transitional type whereas the upper contact of Sarvak Formation wa...

علی آبادی, محمدعلی, پورکاسب, هوشنگ, زراسوندی, علیرضا , طاهری, صادق ,

The Robat-Paein barite deposit is located about 30 Km northwest of Khomein city, in the Sanandajـ Sirjan zone. The Lower Cretaceous carbonate sequences are the host rock of barite mineralization in the Robat-Paein­ deposit.­­ These carbonate sequences consist mainly of massive bedded orbitolina-bearing limestone (undergone dolomitization in some areas) as well as marl, shale and thinly bedded l...

اختصاصی, محمدرضا, رجبی, محمدرسول, صالح‌پور جم, امین, مصفایی, جمال,

Determining the relative contribution of sediment sources is the first step in planning for soil conservation programs. Due to many problems of traditional methods for determining the contribution of sediment sources, fingerprinting technique have attracted the researchers as an appropriate alternative. The main purpose of this study was to determine the relative contribution and importance of ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه اصفهان - دانشکده علوم 1389

در این پژوهش سنگ چینه نگاری، زیست چینه نگاری ریز رخساره ها و همچنین محیط رسوبی سازند سروک در طاقدیس آغار (جنوب غرب فیروزآباد) مورد بررسی قرار گرفت. برش مورد مطالعه در ناحیه مذکور 208 متر ضخامت دارد. در ناحیه مورد مطالعه، مرز زیرین سازند سروک با سازند کژدمی به صورت هم شیب و تدریجی می باشد و مرز بالایی این سازند با سازند ایلام یا سروک بالایی، بصورت ناپیوستگی فرسایشی است. سنگ شناسی سازند سروک در ب...

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