浅议峡东陡山沱组的“瓶状微化石”  

COMMENTS ON THE "VASE-SHAPED MICROFOSSILS" FROM THE DOUSHANTUO FORMATION OF THE EASTERN YANGTZE GORGES

作　　者：张忠英[1] 

机构地区：[1]南京大学地球科学系

出　　处：《微体古生物学报》1994年第3期369-371,共3页Acta Micropalaeontologica Sinica

摘　　要：通过对峡东晚震旦世陡山沱组岩石样品的化学浸解处理、连续切片研究及大量薄片观察，作者认为先前报道的陡山沱组“瓶状微化石”，即所谓最古老的原生动物的外壳遗骸，实际上并非什么瓶状微化石，而是一种有蓝藻（可能还有细菌）参与的沉积构造。The intriguing 'vase-shaped microfossils',consisting of 13 species in 9 genera,were reported by Duan Cheng-hua and Cao Fang(1989) from the Doushantuo Formation(Late Sinian) of the eastern Yangtze Gorges.They were regarded as test remains of the earliest protists.After examining macerated preparations,serial sections of selected individuals,and a great many petrographic thin sections under the microscope,the writer considers that they are not vase-shaped microfossils,but a kind of sedimentary structure with some cyanophytes or bacteria involved in its formation.

关 键 词：瓶状微化石 沉积构造 陡山沱组 峡东 微体化石 

分 类 号：Q913.2[天文地球—古生物学与地层学]