Benthic Foraminiferal and Calcareous Algae Assemblages in the Tirgan Formation (Urgonien Facies Type) in South Flank of Ghorogh Syncline (North of Chenaran), NE Iran

• 作者: Ali Asghar Aryaei Davood Jahani Ebrahim Khademi Bouriabadi Hoda Yavarmanesh Mohsen Pourkermani Seyed Hamid Vaziri
• 来源期刊: 地质学期刊(英文)
• 学科: 生物学
• 关键词: Tirgan FORMATION Ghorogh SYNCLINE FORAMINIFERA CALCAREOUS Algae
• 年，卷（期）: 2017,（6）
• 页码范围: 796-805
• 页数: 10页
• 分类号: Q91

摘要

In this research, the Tirgan Formation in the south flank of Ghorogh Syncline (north of Chenaran), northeastern Iran with the thickness of 251 was studied. This section consists of limestone, marly limestone and shale with impressions of echinoderms toxasteridae family, many of foraminifera from orbitolinidae family and also lots of calcareous algae that create facies variation along with other non-skeletal allochems. Micropaleontological investigation has been carried out on 90 thin-sections. These criteria reveal that an equivalent of the Urgonian facies type (in France-Swiss area) and open marine, low depth sedimentary basin are extended in the Kopet-Dagh basin. In this article, we tried to introduce some of the important foraminiferal and calcareous algal assemblages of this area.