Paleogeography of the Southern Baltic Region in the late Mesozoic: Implications of foraminifers |
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Authors: | N P Lukashina |
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Institution: | 1. Altantic Branch, P.P. Shirshov Institute of Oceanology, Russian Academy of Sciences, Kaliningrad, Russia
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Abstract: | Foraminifers from Middle-Upper Jurassic and Upper Cretaceous sediments of the Kaliningrad basin located in the southwestern
part of the East European platform are studied. During the greater part of the Late Mesozoic, the study region represented
a northern margin of a spacious epicontinental sea in the Boreal zoogeographic realm. The analyzed composition and quantitative
distribution of foraminifers, ratio between planktonic and benthic species, ornamentation degree of tests, and their preservation
are used to reconstruct paleogeography and history of eustatic sea-level changes. The upper Callovian through Upper Jurassic
zonation based on distribution of Epistomina species is proposed. Defined foraminiferal assemblages are correlated with coeval assemblages from the East to West European
platforms and North Atlantic |
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