DETAILED BIOSTRATIGRAPHY OF TRIASSIC DEPOSITS IN THE LENA LOWER REACHES (northern Yakutia)
A.G. Konstantinov, E.S. Sobolev, A.V. Yadrenkin
Institute of Petroleum Geology and Geophysics, Siberian Branch of the RAS, 3 prosp. Akad. Koptyuga, Novosibirsk, 630090, Russia
Keywords: Triassic; ammonoids; nautiloids; bivalves; foraminifers; biostratigraphy; zonal scales; correlation
Pages: 721-736
Abstract
Triassic sections of the Lena lower reaches (northern Yakutia) were studied. Stratigraphy and paleontology of the Triassic deposits were refined and described in detail, and their age was constrained by different fauna groups. The first detailed local Triassic biostratigraphic scheme is reported, which includes ammonoid, nautiloid, and bivalve zones and subzones and foraminifer beds. The scheme is compared with the Canadian Triassic Zonal and Standard (International) Scales.
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