Mesozoic Platform Megasequences in the Eastern Part of the Russian Plate
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On the basis of investigations of the sequences and chronostratigraphy of the Middle Jurassic–Lower Cretaceous deposits in the eastern part of the Russian Plate, five megasequences are identified: the upper Bajocian–Callovian, Oxfordian–Berriasian, Valanginian, upper Hauterivian–Aptian, and Albian megasequences. These were formed under stable tectonic–eustatic conditions (without long breaks in sedimentation). The megasequences are characterized by peculiar sediment compositions: mineral assemblages are specific to individual horizons, units, or the entire megasequence, and they include a specific complex of solid mineral resources.
KeywordsSequence stratigraphy Chronostratigraphy Megasequences Solid mineral resources
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