滇西南耿马弄巴剖面的晚古生代放射虫动物群

滇西南耿马弄巴剖面的硅质岩层中,存在大量放射虫化石,计有12属28种,时代跨越晚古生代,可建立两个组合和三个化石带:晚泥盆世Entactinia-Entactinosphaera组合;早石炭世杜内期中期Albaillellaparadoxa带,杜内期晚期—维宪期早期Albaillellaindensis带,维宪期中期Albaillellacartalla带;晚二叠世Entactiniaitsu-kaichiensis组合。弄巴剖面是由7个主要地层断片组成的断片型地层体,放射虫的研究为地层断片的时代归属问题提供了准确的微体古生物证据。

LATE PALEOZOIC RADIOLARIANS FROM THE NONGBA SECTION, IN GENGMA,SOUTH-WESTERN YUNNAN

There are many nodules in silicalite interlayer in the Nongba section, Gengma, South-Western Yunnan. The fossil radiolarians include 28 species belonging to 12 genera, which belong to two combinations and three zones. Entactinia-F.ntactinosphaera combination in the late Devonian, Albaillella paradoxa zone in the Middle Tournaisian, Albaillella indensis zone in the Late Tournaisian- the Early Visean, Albaillella cartalla zone in the Middle Visean, Entactinia itsukaichiensis combination in the Late Permian. The Nongba section is a fragment stratum system, made up of seven different age and different lithology stratum fragments according to the previous work and our own study, and the research of radiolarians provides accurate micropalaeontology evidence for the ages of these fragment strata.