Biostratigraphy and sedimentary settings of the Upper Bajocian-Lower Bathonian in the vicinity of Saratov (Central Russia)
作者: Vasily MittaVictoria KostylevaOksana DzyubaLarisa GlinskikhBoris ShuryginVladimir SeltzerAlexey IvanovOlga Urman
刊名: Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen, 2014, Vol.271 (1), pp.95-121
来源数据库: Schweizerbart Journal
DOI: 10.1127/0077-7749/2014/0380
关键词: ammonoideabajocianbathonianbelemnoideabivalviaboreal-tethyan correlationforaminiferarussian platformsedimentology
英文摘要: This paper presents the results of a detailed study of the Bajocian-Bathonian sections in the ?Sokur? Quarry near the city of Saratov and of a borehole drilled in the same quarry. The study of these Bajocian-Bathonian boundary beds, unique for the Boreal-Tethyan ecotone,offers a solution to the much-debated problem of the Middle Jurassic Boreal-Tethyan correlation. The Bajocian-Bathonian boundary beds of this section contain both Peri-Tethyan and Boreal ammonite species, allowing recognition of the Boreal ammonite zones and associated ?Boreal?Bathonian zones based on belemnites, bivalves, and foraminifers. This integrated biostratigraphy allows correlation of the Late Bajocian-Early Bathonian boundary interval of the Boreal Jurassic scale with the Submediterranean standard scale.
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  • Bajocian 巴裘阶
  • sedimentary 沉积的
  • vicinity 邻近
  • Upper 上方
  • Lower 下部的