Document Type : Original Research Paper
Authors
1 Assistant Professor, School of Geology, College of Science, University of Tehran, Tehran, Iran
2 Assistant Professor, Department of Earth Sciences, Faculty of Science, Shiraz University, Shiraz, Iran
Abstract
Jurassic deposits are well spread in the north of Karim Abad village, north of Bahabad, central Iran. These deposits contain 41 species of palynomorphs, in which 15 spore species (12 genera), 15 pollen species (10 genera), and 10 species of dinocysts (3 genera) were identified. Vertical distribution of miospores allows erection within the Hojedk Formation of one biozone–Klukisporites variegatus- Chasmatosporites apertus Interval zone based on the FOO and LOO of selected taxa. Moreover, vertical distribution of dinoflagellate cysts allows erection within this formation of one biozone- Nannoceratopsis triceras-Nannoceratopsis gracilis Assemblage zone. The relative abundance of dinoflagellate cysts, spore, and pollen is 86.21%, 7.2%, and 6.6%, respectively. Therefore, the relative abundance of dinoflagellate cysts was high and the marine environment was prominent in this area during Jurassic sedimentation. Based on relative abundance of miospores' parent plant fossils, ferns, cycads, and conifers are 37%, 31.5% and 11.82%, respectively, and related sporomorph ecogroups (SEGs) indicate that they occurred in different environments such as upland, wetter / drier lowland, river and coastal with temperate-sub-tropical and humid climate.
Keywords
Main Subjects
کتابنگاری
آقانباتی، س. ع.، 1377- چینه شناسی ژوراسیک ایران، جلد اول، انتشارات سازمان زمین شناسی ایران، تهران، 355 ص.
آقانباتی، س. ع.، 1393- فرهنگ چینه شناسی ایران، جلد چهارم، ژوراسیک، سازمان زمین شناسی و اکتشافات معدنی کشور ایران، تهران، 544 ص.
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واعظ جوادی، ف.، 1397- زیست چینه نگاری داینوفلاژله های ژوراسیک میانی سازند هجدک در کوچکعلی جنوبی، طبس و تطابق آن با دیگر زیست زون های پالینومورفی هم ارز، فصلنامه علوم زمین، انتشارات سازمان زمین شناسی کشور، شماره 107، صص. 276-265. DOI: 10.22071/GSJ.2018.63837
واعظ جوادی، ف.، قویدل سیوکی، م. و قاسمی نژاد، ا.، 1382- بیوستراتیگرافی سازند شمشک کوه ازون، جاجرم بر مبنای داینوفلاژله ها، مجله علوم دانشگاه تهران، شماره 1-29، صص. 141-160.
هاشمی یزدی، ف.، سجادی، ف. و هاشمی، س. ح.، 1393- پالینوستراتیگرافی سازند هجدک در برش اشکلی، شمال کرمان بر مبنای میوسپورها، مجله دیرینه شناسی، شماره 1-2، صص. 127-111، DOI: https://doi.org/10.22067.
هاشمی یزدی، ف.، سجادی، ف.، و هاشمی، س. ح.، 1397- پالینوستراتیگرافی رسوبات ژوراسیک میانی (دوگر) البرز مرکزی و شرقی، مجله پژوهش های چینه نگاری و رسوب شناسی، اصفهان، شماره 3-72، صص. 36-21،DOI: 10.22108/JSSR.2018.109218.1039 .
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