湖北秭归泄滩沙镇溪组底部轮藻化石的发现  

Discovery of stonewort fossils from the bottom of Shazhenxi Formation in Xietan,Zigui,Hubei Province

作　　者：陈辉明[1] 张振来[1] 

机构地区：[1]宜昌地质矿产研究所,湖北宜昌443003

出　　处：《华南地质与矿产》2003年第3期54-59,共6页Geology and Mineral Resources of South China

基　　金：中国地质调查局综合研究项目(200113900072).

摘　　要：晚三叠世轮藻化石在世界各地发现很少,在我国南方亦尚属首次发现。报道了秭归盆地上三叠统沙镇溪组底部的轮藻化石,计有3属4种(包括2个新种):StellatocharasubspaericaKozuretReinhardt,S.xietanensissp.nov.,Cuneatocharasanxiaensissp.nov.,Vladimirielladecora(Saidakovsky)。根据沙镇溪组轮藻化石在国内外地质时期的分布,结合同层中所产孢粉化石的组合特征,详细讨论了含化石层位的地质时代,认为属晚三叠世早期,并对当时的古植被、古地理、古气候做了初步探讨,对化石进行了描述。Stonewort fossils of late Triassic are very rare in the world.These fossils reported here are hosted in the base of Upper Triassic Shazhenxi Formation in Zigui basin,including a total of 3 genera and 4 species with 2 new species: Stellatochara subspaerica Kozur et Reinhardt,S.xietanensis sp. nov.,Cuneatochara sanxiaensis sp. nov.,Vladimiriella decora (Saidakovsky).On the basis of distribution of stonewort fossils both at home and abroad in geological period and describing to their features,combining assemblage of sporopollen fossils in the same stratum,the geological age of the stratum hosting these fossils (Late Triassic) and the characteristics of ancient vegetation,ancient geography and ancient climate are systematically discussed.

关 键 词：轮藻化石 沙镇溪组 上三叠统 秭归盆地 湖北 

分 类 号：Q913.84[天文地球—古生物学与地层学] P534.51[生物学—古生物学]