文章基本信息

标题：Revision of ammonoid biostratigraphy in the Frasnian (Upper Devonian) of the Southern Timan (Northeast Russian Platform)
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作者：R. Thomas Becker ; Michael R. House ; Vladimir V. Menner 等
期刊名称：Acta geologica Polonica
印刷版ISSN：0001-5709
出版年度：2000
卷号：50
期号：1
页码：67-97
语种：English
出版社：Institute of Geology, University of Warsaw
摘要：New field work in outcrops of the Ukhta Region (Southern Timan) together with the re-exanimation of former collections allows a detailed revision of the ammonoid zonation in one of the classical Frasnian regions of Russia. There is a total of 47 species, 18 of which are new or recorded for the first time from the region. The latter applies to representatives of Linguatornoceras, Phoenixites, Aulatornoceras s.str. and Acanthoclymenia. New taxa are Chutoceras manticoides n.gen. n.sp. and Linguatornoceras yudinae n.sp. In the Ust’yarega Formation regional Hoeninghausia nalivkini, Timanites keyserlingi and Komioceras stuckenbergi Zones can be recognized which correlate with the international Frasnian divisions UD I-B/C. The Ponticeras domanicense Zone (UD I-E) occupies most of the Lower Domanik, the Nordiceras timanicum Zone (UD I-F to I-H) is developed in the Middle and Upper Domanik. Following a poorly defined and short interval with rare Carinoceras, pelagic sequences of the Lyaiol Formation (Members 2-4) fall in the Virginoceras jaschenkoae and Manticoceras lyaiolense Zones (UD I-I/J). Late Frasnian deposits (UD I-K/L) have not yielded any ammonoids so far. Correlation between the new zonation and the conodont zonation (Montagne Noire zones) is provided.
关键词：Timan;Russia;Devonian;Frasnian;Ammonoids;Goniatites;Biostratigraphy