Late Jurassic (Oxfordian, Bimammatum Zone) ammonites from the eastern Alborz Mountains, Iran

Kazem Seyed-Emami; Gerhard Schairer

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Late Jurassic (Oxfordian, Bimammatum Zone) ammonites from the eastern Alborz Mountains, Iran

机译：伊朗东部阿尔伯兹山脉的晚侏罗纪（牛津，双子岩带）

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From the Upper Jurassic Lar Formation northeast of Jajarm, eastern Alborz, 14 taxa of ammonoids are described. These belong to the following families: Phylloceratidae, Oppeliidae, Glochiceratidae, Perisphinctidae and Aspidoceratidae, most of them recorded for the first time from Iran. The ammonite fauna is Late Oxfordian, Bimammatum Zone, in age. Palaeobiogeographically, the Late Jurassic ammonite fauna of North Iran is closely related to those from epicontinental seas, bordering the northern margins of the western Tethys, intermediate to Mediterranean and Sub-mediterranean provinces. The high percentage of Phylloceratina, occasionally exceeding 50 % of the fauna, indicates a relatively deep marine environment and to some extent closer relations to the Mediterranean Province.

机译：从贾巴尔（Jajarm）东北部的上侏罗世Lar组，阿尔伯兹（Alborz）东部，描述了14种类群。这些属于以下科：loc科，Op科，Glo科，Perisphinctidae和Aspdoceratidae，其中大多数是首次从伊朗记录下来的。 mon虫动物群年龄为牛津晚期，Bimammatum区。在古生物地理学上，伊朗北部的侏罗纪晚期am虫区系与上陆海区的动物区系密切相关，与特提斯西部的北部边缘接壤，处于地中海和地中海南部各省的中间。 Phylloceratina的比例很高，偶尔超过动物总数的50％，这表明海洋环境相对较深，在某种程度上与地中海省的关系更为密切。

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《Neues Jahrbuch fur Geologie und Palaontologie. Abhandlungen》 |2010年第3期|共15页
作者
Kazem Seyed-Emami; Gerhard Schairer;
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正文语种 eng
中图分类地质学;
关键词
Ammonites; Upper Jurassic; Oxfordian; Lar Formation; Alborz Mountains; Iran;

机译：炸药;侏罗纪上层;牛津;拉尔组;阿尔伯兹山;伊朗;

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Late Jurassic (Oxfordian, Bimammatum Zone) ammonites from the eastern Alborz Mountains, Iran

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