NDLI: Palynostratigraphy of the Lower-Middle Jurassic deposits, borehole section Vostok 4 (Southeast of West Siberia)

Content Provider	Springer Nature Link
Author	Goryacheva, A. A.
Copyright Year	2011
Abstract	This work presents the results of palynological investigation of the Vostok 4 borehole section situated in the Azharma region of the Ob-Irtysh facies area, where drilling has penetrated through the Urmanskaya, Ilansk, Peshkovskaya, and Tyumen formations. Six palynoassemblages are distinguished in the section based on the analyzed distribution of spores, pollen of terrestrial plants, and microphytoplankton. According to their succession, the section is subdivided into biostratigraphic units ranked as beds with palynomorphs. Comparative analysis and correlation with the Siberian palynostratigraphic standard scale of the Lower-Middle Jurassic, where succession of palynoassemblages is coordinated with ammonite zones, substantiate the Pliensbachian-Bajocian age of the deposits studied. Diverse microphytoplankton (dinoflagellate cysts, acritarchs, prasinophytes, zignematacean and colonial algae) occurs throughout the section. The facies environment of sedimentation is reconstructed based on quantitative proportions of microphytoplankton taxa.
Starting Page	268
Ending Page	288
Page Count	21
File Format	PDF
ISSN	08695938
Journal	Stratigraphy and Geological Correlation
Volume Number	19
Issue Number	3
e-ISSN	15556263
Language	English
Publisher	SP MAIK Nauka/Interperiodica
Publisher Date	2011-06-17
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	spores pollen dinoflagellate cysts palynology stratigraphy Jurassic West Siberia Geophysics/Geodesy Sedimentology Historical Geology Archaeology Structural Geology
Content Type	Text
Resource Type	Article
Subject	Geology Stratigraphy Paleontology

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