摘要
在广西玉林樟木地区早泥盆世北均塘组、良合塘组、樟木组35属48种腕足动物演化和地层分布特征研究的基础上,建立了6个腕足动物生物带(自下而上):1.Quadrithyrinaexpansa-Prodavidsoniamirabilis带;2.Grayinamagnificaguangxiesis-Schizophoriasulcatina带;3.Reticulariopsiscostatus带;4.Grayinamagnificasinica带;5.Quadrithyrisrobusta-Boucotia带;6.Qrientospiriferwangi带。依据国际对比和与笔石的层位关系认为:第1-3带为晚洛赫柯夫期,并且1、2、3带很可能分别相当晚洛赫柯夫早、中、晚期;第4带为早布拉格早期;第5、6带分别相当中、晚布拉格期。
Based on the evolution of brachiopod communities and ranges of the brachiopod fauna of the Late Lohkovian-Pragian age from the Yulin region, Guangxi, 6 biozones are recognized (in ascending order):1) Quadrithyrina expansaProdavidsonia mirabilis Zone; 2) Grayina magnifica guangxiensisSchizophoria sulcatina Zone; 3) Reticulariopsis costatus Zone; 4) Grayina magnifica sinica Zone; 5) Quadrithyris robustaBoucotia Zone; 6) Orientospinifer wangi Zone. Zones 1-3 are considered to be Late Lochkovian in age, Zone 4 early Early Pragian, Zone 5 Middle Pragian and Zone 6 Late Pragian on the basis of international correlations of the brachiopods and the stratigraphical relationship between brachiopods and graptolites.
出处
《地层学杂志》
CSCD
北大核心
1998年第3期176-184,共9页
Journal of Stratigraphy