Research output: Contribution to journal › Article › peer-review
The Maurynya section, West Siberia : a key section of the Jurassic-Cretaceous boundary deposits of shallow marine genesis. / Dzyuba, O. S.; Pestchevitskaya, E. B.; Urman, O. S. et al.
In: Russian Geology and Geophysics, Vol. 59, No. 7, 01.07.2018, p. 864-890.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - The Maurynya section, West Siberia
T2 - a key section of the Jurassic-Cretaceous boundary deposits of shallow marine genesis
AU - Dzyuba, O. S.
AU - Pestchevitskaya, E. B.
AU - Urman, O. S.
AU - Shurygin, B. N.
AU - Alifirov, A. S.
AU - Igolnikov, A. E.
AU - Kosenko, I. N.
PY - 2018/7/1
Y1 - 2018/7/1
N2 - The Maurynya section exposed on the northwestern margin of West Siberia is one of few continuous sections of the Jurassic-Cretaceous boundary deposits in Boreal regions. In the meantime, it can be considered a reference section for the transitional Volgian-Ryazanian beds formed in shallow water environments of the West Siberian sea basin. This study is a synthesis of the new data with previous results of lithologic, paleontological, biostratigraphic, and (O, C, Sr) isotope studies of the Upper Volgian-lowermost Ryazanian of the Maurynya section. It has been established that the beginning of the Cretaceous (corresponding to the middle Late Volgian) is associated with a sharp increase in species number and diversity of cephalopods and bivalve mollusks on the northwestern margin of the West Siberian sea basin. This can be explained by an increase in its depths and their stabilization at a level which appeared optimal for the habitat of nekton, nektobenthos, and benthic fauna communities, superimposed on the general trend of warming. At the same time, the percentage of phytoplankton significantly increased, indicating the onset of transgression, which affected largely coastal landscapes and type of vegetation: The forests dominated by conifers were gradually succeeded by forests mostly composed of Ginkgoaceae.
AB - The Maurynya section exposed on the northwestern margin of West Siberia is one of few continuous sections of the Jurassic-Cretaceous boundary deposits in Boreal regions. In the meantime, it can be considered a reference section for the transitional Volgian-Ryazanian beds formed in shallow water environments of the West Siberian sea basin. This study is a synthesis of the new data with previous results of lithologic, paleontological, biostratigraphic, and (O, C, Sr) isotope studies of the Upper Volgian-lowermost Ryazanian of the Maurynya section. It has been established that the beginning of the Cretaceous (corresponding to the middle Late Volgian) is associated with a sharp increase in species number and diversity of cephalopods and bivalve mollusks on the northwestern margin of the West Siberian sea basin. This can be explained by an increase in its depths and their stabilization at a level which appeared optimal for the habitat of nekton, nektobenthos, and benthic fauna communities, superimposed on the general trend of warming. At the same time, the percentage of phytoplankton significantly increased, indicating the onset of transgression, which affected largely coastal landscapes and type of vegetation: The forests dominated by conifers were gradually succeeded by forests mostly composed of Ginkgoaceae.
KW - biodiversity
KW - lithology
KW - paleoecology
KW - paleotemperatures
KW - stratigraphy
KW - Volgian and Ryazanian Stages
KW - West Siberia
KW - JURASSIC/CRETACEOUS BOUNDARY
KW - RUSSIAN PLATFORM
KW - CARBON
KW - RIVER
KW - BELEMNITES
KW - NORTHERN-EAST-SIBERIA
KW - SEDIMENTARY BASIN
KW - NORDVIK PENINSULA
KW - LAPTEV SEA
KW - PALEOENVIRONMENTS
UR - http://www.scopus.com/inward/record.url?scp=85049986510&partnerID=8YFLogxK
U2 - 10.1016/j.rgg.2018.07.010
DO - 10.1016/j.rgg.2018.07.010
M3 - Article
AN - SCOPUS:85049986510
VL - 59
SP - 864
EP - 890
JO - Russian Geology and Geophysics
JF - Russian Geology and Geophysics
SN - 1068-7971
IS - 7
ER -
ID: 15966177