Abstract

Ammonites of the subfamily Collignoniceratinae have been found in the Turonian Stage of Western Siberia. These findings have made it possible to substantiate the Collignoniceras woollgari zone in the Middle Turonian of this region, to recognize the ammonite dispersal features in the Arctic region, and to clarify the paleogeography of the Turonian age. Based on the occurrence frequency of Collignoniceras woollgari regulare in the boreholes in the north of Western Siberia, their penetration into the West Siberian basin through the Arctic region from the Western Interior Sea of North America is most likely. Collignoniceratinae has been identified for the first time in the Upper Turonian of the Yangoda River (west of the Yenisei–Khatanga regional trough).

中文翻译：

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西西伯利亚土伦阶（上白垩统）Collignoniceratinae亚科菊石及其对地层学和古地理的意义

摘要

Collignoniceratinae亚科的菊石已在西西伯利亚的土伦阶发现。这些发现使得证实该地区中土兰阶的Collignoniceras Wolgari带、认识北极地区菊石的扩散特征以及阐明土兰纪的古地理成为可能。根据西西伯利亚北部钻孔中Collignoniceraswoolgariregulare的出现频率，它们最有可能从北美西部内海穿过北极地区渗透到西西伯利亚盆地。Collignoniceratinae 首次在仰戈达河上图伦阶（叶尼塞-哈坦加区域海槽以西）被发现。