Middle Cambrian trilobites from Borehole Nizhny Imbak 219 (northwestern Siberian Platform)

Borehole Nizhny Imbak 219 is situated in the northwestern Siberian Platform. Paleontological material comes from the clayey–limestone series at a depth of 2333.3–2314.3 m referred to the Ovatoryctocara and Kounamkites zones of the Middle Cambrian Amgan Stage and from the overlying limestone series a...

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Bibliographic Details
Published inPaleontological journal Vol. 51; no. 11; pp. 1249 - 1292
Main Authors Pegel, T. V., Shabanov, Yu. Ya, Bushuev, E. V., Goryaeva, I. E.
Format Journal Article
LanguageEnglish
Published Moscow Pleiades Publishing 01.12.2017
Springer
Subjects
Earth and Environmental Science
Earth Sciences
Paleontology
trilobites
Middle Cambrian
Siberian Platform
biofacies
International Chronostratigraphic Chart
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Summary:Borehole Nizhny Imbak 219 is situated in the northwestern Siberian Platform. Paleontological material comes from the clayey–limestone series at a depth of 2333.3–2314.3 m referred to the Ovatoryctocara and Kounamkites zones of the Middle Cambrian Amgan Stage and from the overlying limestone series at a depth of 2264.1–2244.0 m referred to the upper part of the Kounamkites Zone and an unnamed zone of the Amgan Stage and also to the Solenopleura patula and Dorypyge olenekensis–Corynexochus perforatus zones of the Middle Cambrian Mayan Stage. The questions of the traditional Lower–Middle Cambrian boundary and the role of Siberian sections in the construction of the International Chronostratigraphic Chart are considered. The trilobites collected are described.
ISSN:0031-0301
1555-6174
DOI:10.1134/S0031030117120024