M. Dehghani; S. Dehghani; V. Ahmadi; A. Zavarei
Abstract
Two stratigraphic sections of Kazhdumi Formation were selected form Sivand (165m.) and Kuh-e-khanekat (108m.) Areas for Pelecypoda avd Echinoides study. Recognized taxones of Bivalvia and Echinoides are following as: Neithea striatocostata, Exogyra undata, Isocardia aff. neglecta, Astarte sp., Opis sp., ...
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Two stratigraphic sections of Kazhdumi Formation were selected form Sivand (165m.) and Kuh-e-khanekat (108m.) Areas for Pelecypoda avd Echinoides study. Recognized taxones of Bivalvia and Echinoides are following as: Neithea striatocostata, Exogyra undata, Isocardia aff. neglecta, Astarte sp., Opis sp., Leptosolen sp.,Trigonia crenulifera, Exogyra flabellata ,Salenidia boulei, Pliotoxaster cf. lyonsi ,Epiaster whitei, Inoceramus sp.Assemblage- zones of the mentioned taxones and comparison of them with accompanied zones (foraminifers), age of studied sediments is Albian to Early Cenomanian.
V. Ahmadi; A. Zavarei; A. Motaharian; M. Munt
Abstract
Three rock units have been identified in Shamsabad and Runiz stratigraphic sections of Asmari Formation in internal Fars region. Gastropods of Shamsabad and Runiz stratigraphic sections belong to four orders, Mesogastropoda, Neogastropoda, Architaenioglossa, Sorbeoconcha. Seven genuses and three subgenus ...
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Three rock units have been identified in Shamsabad and Runiz stratigraphic sections of Asmari Formation in internal Fars region. Gastropods of Shamsabad and Runiz stratigraphic sections belong to four orders, Mesogastropoda, Neogastropoda, Architaenioglossa, Sorbeoconcha. Seven genuses and three subgenus have been recognized in lower and middle parts. In general, four genuses and one subgenus of gastropods in lower part indicating the age of Chatian, two genuses and two subgenus in middle part are indicating the age of Aquitanian and a genus in upper part indicating the age of middle Eocene (lower boundary of Asmari Formation) has been observed with foraminifers species that include Somalina stefunini, Rhapydionina urensis. the age of Asmari Formation gastropods in the studied region is alike with associated foraminifera biozones that include, Nummulites fichteli – Nummulites intermedius – Nummulites vascus assemblage – zone, indicating the age of Chatian and Austroterillina howchini – Peneroplis evolutus assemblage –zone, indicating the age of Aquitanian. Gastropods recognized in sections, are listed below: Olivella sp., Mitra sp., Ampullina sp., Ampullospira sp., Campanile sp., Strombus sp., Natica sp., Tortoliva sp., Lithoconus sp., Dendroconus sp.
R. Mirzaee Mahmoodabadi; Y. Lasemi; M. Afghah
Abstract
Shaley Pabdeh Formation (Paleocene-Oligomiocene) expanded in Fars, Khozestan and Lorestan. Lower Lithostratigraphical limit with Gurpi Formation recognized by purple shale. Upper Lithostratigraphical limith with Asmari Formation is transitional. In order to study sedimentary environments and sequence ...
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Shaley Pabdeh Formation (Paleocene-Oligomiocene) expanded in Fars, Khozestan and Lorestan. Lower Lithostratigraphical limit with Gurpi Formation recognized by purple shale. Upper Lithostratigraphical limith with Asmari Formation is transitional. In order to study sedimentary environments and sequence stratigraphy of Pabdeh Formation two stratigraphic sections were chosen (Zanjiran and Shahneshin). Petrographic study indicated 9 pelagic and calciturbidite microfacies. These microfacies in deep marine deposited. Calciturbidite facies were formed during sea level highstand, when high rate of carbonate production result in transportation of carbonate sediment in deep sea. Sequence stratigraphy study shows that Pabdeh Formation consists of two depositional sequences. In Zanjiran section lower and upper contact of first sequence is type two and upper contact of second depositional sequence is conformity with unconformity. In Shahneshin section the lower contact is type two and upper contact is correlative conformity with unconformity.
