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- Title
Main phytostratigraphic boundaries in the Jurassic deposits of Western Siberia.
- Authors
Mogutcheva, N.
- Abstract
The study of the large collections of plant remains gained from cores of numerous boreholes drilled in Western Siberia made it possible to determine the taxonomic composition of the Jurassic flora of this region, the stages of its evolution, and the sequence of floral assemblages, which characterize the regional stratigraphic horizons indirectly correlated via series of parallel faunal, microfaunal, spore and pollen zonal scales with a general stratigraphic scale. The compositions of floral assemblages was established in the Hettangian-lower part of the upper Pliensbachian, upper part of the upper Pliensbachian, lower Toarcian, upper Toarcian, Aalenian, Bajocian, Bathonian, and Callovian-Oxfordian sediments. Criteria were elaborated to substantiate the Triassic-Jurassic and Lower-Middle Jurassic boundaries. Lithologically and biostrati-graphically, the Middle-Upper Jurassic boundary is poorly expressed.
- Subjects
SIBERIA (Russia); PLANT remains (Archaeology); ANIMAL adaptation; COMPOSITION of pollen; BIOSTRATIGRAPHY; JURASSIC paleobotany
- Publication
Stratigraphy & Geological Correlation, 2014, Vol 22, Issue 3, p231
- ISSN
0869-5938
- Publication type
Article
- DOI
10.1134/S0869593814030083