Marine dinoflagellates from Lower Cretaceous Muling Formation of Jixi Basin,China and their palaeoenvi-ronmental significance  

作　　者：YANGXiaoju HEChengquan LIWenben PIAOTaiyuan 

机构地区：[1]NanjingInstituteofGeologyandPalaeontology,ChineseAcademyofSciences,Nanjing210008,China [2]The8thProspectingCompanyofNortheastBureauofCoalGeology,Jixi158100,China

出　　处：《Chinese Science Bulletin》2003年第22期2480-2483,共4页

基　　金：supported by the Pilot Project of Knowledge Innovation Program of the Chinese Academy of Sciences(Grant No.KZCX2-114);the National Natural Science Foundation of China(Grant No.40072004).

摘　　要：Newly discovered marine dinoflagellates from the lower-middle parts of the Lower Cretaceous Muling Formation of the Jixi Basin, eastern Heilongjiang Province, China, were identified as Circulodinium cingulatum He et al., C. attadalicum (Cookson et Eisenack) Helby, Palaeoperidinium cretaceum Pocock, Oligosphaeridium totum Brideaux and Sentusidinium sp. Most of these species are distributed in the marine Lower Cretaceous strata of Europe, North America, Africa, Australia and Asia. It demonstrates that a transgression occurred in eastern Heilongjiang Province during the deposition of the Muling Formation, which was previously considered to be a coal-bearing continental stratigraphic unit. The marine dinoflagellates indicated that the Muling Formation is Barremian in age. The Palaeogeographic framework of eastern Heilongjiang Province in Late Mesozoic era should be rebuilt through systematic facies analyses of the marine, paralic and terrestrial deposits.Newly discovered marine dinoflagellates from the lower-middle parts of the Lower Cretaceous Muling Formation of the Jixi Basin, eastern Heilongjiang Province, China, were identified as Circulodinium cingulatum He et al., C. attadalicum (Cookson et Eisenack) Helby, Palaeoperidinium cretaceum Pocock, Oligosphaeridium totum Brideaux and Sentusidinium sp. Most of these species are distributed in the marine Lower Cretaceous strata of Europe, North America, Africa, Australia and Asia. It demonstrates that a transgression occurred in eastern Heilongjiang Province during the deposition of the Muling Formation, which was previously considered to be a coal-bearing continental stratigraphic unit. The marine dinoflagellates indicated that the Muling Formation is Barremian in age. The Palaeogeographic framework of eastern Heilongjiang Province in Late Mesozoic era should be rebuilt through systematic facies analyses of the marine, paralic and terrestrial deposits.

关 键 词：腰鞭毛虫 白垩纪 中国 黑龙江 中生代 

分 类 号：Q959.112[生物学—动物学]