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Callovian and Upper Jurassic foraminiferal and ammonite biostratigraphy of the Shaim petroleum region (West Siberia)
Institution:1. Department of Geography, Geology and the Environment, Kingston University London, Kingston Upon Thames, KT1 2EE, UK;2. Evolution Applied Limited, 33 Gainsborough Drive, Sherborne, Dorset, DT9 6DS, UK;3. Geological Survey of North Rhine-Westphalia, De-Greiff-Str. 195, Krefeld, 47803, Germany;4. Institute of Geosciences, Goethe University Frankfurt, Altenhöferallee 1, Frankfurt, 60438, Germany;5. Faculty of Geology, University of Warsaw, Żwirki i Wigury 93, Warszawa, 02-089, Poland;1. School of Geotechnology, Institute of Engineering, Suranaree University of Technology, 111, University Avenue, Mueang District, 30000 Nakhon Ratchasima Province, Thailand;2. CR2P, MNHN-CNRS-UPMC Paris VI, Sorbonne Universités, 8, rue Buffon, 75005 Paris, France;1. Instituto Tecnológico de Micropaleontologia, itt Fossil, Universidade do Vale do Rio dos Sinos - UNISINOS, Av. Unisinos, 950, CEP 93022-750 São Leopoldo-RS, Brazil;2. Programa de Pós-Graduação em Geologia - PPGEO, Universidade do Vale do Rio dos Sinos - UNISINOS, Av. Unisinos, 950, CEP 93022-750 São Leopoldo-RS, Brazil;3. Natural History Museum, University of Oslo, 0318 Oslo, Norway
Abstract:The results of biostratigraphic analysis of foraminiferal assemblages were used to identify a nearly complete succesion of biostratigraphic units in the Callovian-Upper Jurassic section of the Shaim region. The finds of the ammonites from different parts of the Callovian-Volgian sections helped to correlate the identified foraminiferal biostratigraphic units to the General Stratigraphic Scale. Analysis of variations in the taxonomic composition and structure of foraminiferal assemblages allowed refinement of paleontological characteristics of the foraminiferal biostratigraphic units for different facies conditions in the southwest of the West Siberian Basin.
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