Revision of ammonoid biostratigraphy in the Frasnian (Upper Devonian) of the Southern Timan (Northeast Russian Platform)

• Autorzy: Becker R.
• Języki publikacji: EN

Abstrakty

EN

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 which rare Carinoceras, pelagic sequences of the Lyaiol Formation (Members 2-4) fall in the Virginoceras ljaschenkoae and Manticoceras lyaiolense Zones (UD I-I/J). Late Frasnian deposits (UD I-K/L) have not yielded any ammonoids so far. Correlation betwen the new zonation and the conodont zonation (Montagne Noire zones) is provided.

Słowa kluczowe

EN

ammonoids; biostratigraphy; Devonian; Frasnian; goniatites; Russia; Timan

• Wydawca: Faculty of Geology of the University of Warsaw ; Komitet Nauk Geologicznych PAN
• Czasopismo: Acta Geologica Polonica
• Rocznik: 2000
• Tom: Vol. 50, no. 1
• Strony: 67--97
• Opis fizyczny: Bibliogr. 46 poz.

Twórcy

autor

Becker R.

• Museum fur Naturkunde der Humboldt-Universitat zu Berlin, Invalidenstr. 43, D-10115 Berlin