University of IsfahanJournal of Stratigraphy and Sedimentology Researches2008-788827420120121Microbiostratigraphy of upper Dalan and Kangan formations based on foraminifera in Lavan3 subsurface section (Persian Gulf Basin)Microbiostratigraphy of upper Dalan and Kangan formations based on foraminifera in Lavan3 subsurface section (Persian Gulf Basin)12016764FAJournal Article20160614   AbstractMicrobiostratigraphic studies of upper Dalan and Kangan formations in Lavan section resulted in identification of 116 species belonging to 55 genera of foraminifera and 7 species of alges. Paraglobivalvulina mira assemblage zone, Claraia aurita and Spirorbis phlyctaenae assemblage zones were recorde from upper Dalan and Kangan Formations. In this section, Dalan Formation contains limestone â Dolomitic limestone to calcareous dolomite that often are mixed with anhydrite. The researche indicate an age of Dzhulfian for the upper part of the Dalan Formation and it seems that the Dorashamian stage, the latest part of Permian, has not been present indicating an important gap. It seems that the extinction of fauna in latest Permian is related to uplifting of basin and lack of sedimentation or erosional processes. The Kangan deposits also classified as dolomite to calcareous dolomite and shale that sometimes have been observed with interlayers of anhydrite . These lay on Permian deposits with an unconformity and slight variation of fauna indicates the age of Anisian.         AbstractMicrobiostratigraphic studies of upper Dalan and Kangan formations in Lavan section resulted in identification of 116 species belonging to 55 genera of foraminifera and 7 species of alges. Paraglobivalvulina mira assemblage zone, Claraia aurita and Spirorbis phlyctaenae assemblage zones were recorde from upper Dalan and Kangan Formations. In this section, Dalan Formation contains limestone â Dolomitic limestone to calcareous dolomite that often are mixed with anhydrite. The researche indicate an age of Dzhulfian for the upper part of the Dalan Formation and it seems that the Dorashamian stage, the latest part of Permian, has not been present indicating an important gap. It seems that the extinction of fauna in latest Permian is related to uplifting of basin and lack of sedimentation or erosional processes. The Kangan deposits also classified as dolomite to calcareous dolomite and shale that sometimes have been observed with interlayers of anhydrite . These lay on Permian deposits with an unconformity and slight variation of fauna indicates the age of Anisian.      https://jssr.ui.ac.ir/article_16764_bb351db4b21bb8c21713eff1052ff84f.pdfUniversity of IsfahanJournal of Stratigraphy and Sedimentology Researches2008-788827420120121213016765FAJournal Article20160614https://jssr.ui.ac.ir/article_16765_5b6e0145726e9fdaeaf508c29d79b78a.pdfUniversity of IsfahanJournal of Stratigraphy and Sedimentology Researches2008-788827420120121314816766FAJournal Article20160614https://jssr.ui.ac.ir/article_16766_631883027bc041442500926aa7dcd152.pdfUniversity of IsfahanJournal of Stratigraphy and Sedimentology Researches2008-788827420120121496416767FAJournal Article20160614https://jssr.ui.ac.ir/article_16767_7ba0f052d60edbf8a49be229e3e7cee2.pdfUniversity of IsfahanJournal of Stratigraphy and Sedimentology Researches2008-788827420120121658416768FAJournal Article20160614https://jssr.ui.ac.ir/article_16768_61c62f03d77a156e163cb2751fd665c0.pdfUniversity of IsfahanJournal of Stratigraphy and Sedimentology Researches2008-788827420120121Nannostratigraphy and palaeoecology of Shurijeh - Tirgan formations in Kalat and Mozduran sections (East of Kopeh â Dagh).Nannostratigraphy and palaeoecology of Shurijeh - Tirgan formations in Kalat and Mozduran sections (East of Kopeh â Dagh).8510016762FAJournal Article20160614      Abstract  Calcareous nannofossils from boundary of Shurijeh and Tirgan formations at Kalat and Mozduran sections have been studied. These sections were situated in the East of Kopeh-Dagh Basin.In this study 22 nannoplankton species of 15 genera in Kalat section and 20 species of 14 genera in Mozduran section were identified. According to the last occurrence of index species and fossil assemblages calcareous nannofossil biozone (CC5) of Sissingh (1977) has been recognized . Based on this biozone, age of this boundary at kalat and Mozduran sections is Late Hauterivian-Early Barremian.        Abstract  Calcareous nannofossils from boundary of Shurijeh and Tirgan formations at Kalat and Mozduran sections have been studied. These sections were situated in the East of Kopeh-Dagh Basin.In this study 22 nannoplankton species of 15 genera in Kalat section and 20 species of 14 genera in Mozduran section were identified. According to the last occurrence of index species and fossil assemblages calcareous nannofossil biozone (CC5) of Sissingh (1977) has been recognized . Based on this biozone, age of this boundary at kalat and Mozduran sections is Late Hauterivian-Early Barremian.  https://jssr.ui.ac.ir/article_16762_c7c2d8173592372d11e749f87849de63.pdfUniversity of IsfahanJournal of Stratigraphy and Sedimentology Researches2008-788827420120121Study of Khoran Strait bedforms and deposits (Laft- Pohl), East of Persian GulfStudy of Khoran Strait bedforms and deposits (Laft- Pohl), East of Persian Gulf10112016763FAJournal Article20160614    Abstact   In this research has tried which the area with 20 Km2 width (in Khoran Strait) has studied with respect to shallow seismic, sedimentology and bedforms investigation.  Bedforms in this area are composed of simple large flood-dominated dunes with wavelengths between 10 and 100 meters, composite medium to very large flood-dominated dunes with wavelengths between 5 to >100 meters, simple- and composite large to very large ebb dominated dunes with wavelengths between 30 to >100 meters and simple medium to very large ebb dominated dunes. Maximum wavelength observed in the area belongs to composite large to very large, 10 meters high ebb- dominated dunes with a wavelength of 300 meters, which superimposed on their stoss side smaller bedforms with wavelengths of 20 to 30 meters . In lower flow regime, flow and sediment transport accelerates from trough to crest and migrating regime of dunes are downstream. Based on granulometry and morphoscopic studies, sediments of bedforms are mainly composed of coarse fractions (ranging from medium sand to granule). Their composition is bioclastic accompanied by clastic fractions (quartz, rock fragment and mica).         Abstact   In this research has tried which the area with 20 Km2 width (in Khoran Strait) has studied with respect to shallow seismic, sedimentology and bedforms investigation.  Bedforms in this area are composed of simple large flood-dominated dunes with wavelengths between 10 and 100 meters, composite medium to very large flood-dominated dunes with wavelengths between 5 to >100 meters, simple- and composite large to very large ebb dominated dunes with wavelengths between 30 to >100 meters and simple medium to very large ebb dominated dunes. Maximum wavelength observed in the area belongs to composite large to very large, 10 meters high ebb- dominated dunes with a wavelength of 300 meters, which superimposed on their stoss side smaller bedforms with wavelengths of 20 to 30 meters . In lower flow regime, flow and sediment transport accelerates from trough to crest and migrating regime of dunes are downstream. Based on granulometry and morphoscopic studies, sediments of bedforms are mainly composed of coarse fractions (ranging from medium sand to granule). Their composition is bioclastic accompanied by clastic fractions (quartz, rock fragment and mica).     https://jssr.ui.ac.ir/article_16763_c01f14021bb67d82b03f6f7e13c0c0b1.pdf