Journal
PALEONTOLOGICAL JOURNAL
Volume 53, Issue 8, Pages 808-811Publisher
PLEIADES PUBLISHING INC
DOI: 10.1134/S0031030119080239
Keywords
Radiolarians; Lower Cretaceous; Western Siberia; SEM and X-ray microtomography
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Funding
- Geological Institute, Russian Academy of Sciences [116032510034, 0135-2019-0057]
- Russian Foundation for Basic Research [18-05-00494-a]
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Three-dimensional SEM images of the radiolarian species Williriedellum salymicum Kozlova, 1983 were obtained for the first time, from the Berriasian-Valanginian Parvicingula khabakovi - Williriedellum salymicum biohorizon of the Bazhenov Formation (based on material from the Gubkinskaya and Radonezh boreholes). Using computer tomography (CT) and scanning electron microscopy (SEM) methods, in addition to optical microscopy, we were able to confirm the validity of the species Williriedellum salymicum Kozlova, 1983 and we propose that this biohorizon be included in the Lower Cretaceous regional stratigraphic scheme of Western Siberia.
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