Microfossils from the Upper Sinian (Late Neoproterozoic) Doushantuo Formation in Changyang, Western Hubei, China

作     者：YIN Chongyu (Institute of Geology,Chinese Academy of Geological Sciences, Beijing 100037) 

出 版 物：《Continental Dynamics》 (大陆动力学(英文版))

年 卷 期：1999年第2期

页      面：1-18页

学科分类：0709[理学-地质学] 081803[工学-地质工程] 07[理学] 08[工学] 0818[工学-地质资源与地质工程] 

主　　题：microfossils Upper Sinian Doushantuo Formation Late Neoproterozoic 

摘      要：Chert of the Upper Sinian Doushantuo Formation near Changyang, western Hubei, China, contains an exceptionally well-preserved assemblage of spinose, spheroidal, and filamentous microfossils belonging to nineteen species. In this assemblage at least fifteen taxa are recognised to be plankton and only four to be microbenthos. The existing of large acanthomorphic acritarchs and a small number of microbenthos (matbuilding cyanobacteria) suggest an open coastal marine depositional environment. In comparison with probable coeval assemblages described from the Baklia Formation Prins Karls Forland, Svalbard (Knoll, 1992a) and the Biskopasen Conglomerate, Norway (Spjeldnaes 1963, 1967; Vidal, 1990), the Doushantuo microfossils (which have similar taxa) are remarkably abundant, diverse, and well-preserved. These data demonstrate the broad geographical distribution of pre-Ediacarian microbial taxa and further validate the use of acritarchs for the correlation of pre-Ediacarian successions.