A new discovery of macroscopic fossils from the Ediacaran Doushantuo Formation in the Yangtze Gorges area  

作　　者：TANG Feng YIN Chongyu Bengtson Stefan LIU Yongqing WANG Ziqiang LIU Pengju GAO Linzhi 

机构地区：[1]Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China [2]Department of Palaeozoology, Swedish Museum of Natural History, Box 50007, SE-10405 Stockholm, Sweden [3]School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China

出　　处：《Chinese Science Bulletin》2006年第12期1487-1493,共7页

基　　金：The authors are particularly grateful to Prof.Xing Yusheng and Wang Xiaofeng for providing the field information and the valuable comments.This work was supported by the National Natural Science Foundation of China(Grant No.40272015);a special grant from China Geological Survey(Grant No.200213000042)to Yin Chongyu.

摘　　要：Two new horizons with macroscopic fossils are reported in the Doushantuo Formation, Ediacaran System, from the Yangtze Gorges area. The fossils were discovered in the lower and middle black shales of the Doushantuo Formation in the new section at Sandouping Town, Zigui County, Hubei Province. The new macroscopic assemblages in- clude Chuaria and Tawuia, and occur below the well- known ”Miaohe Biota”. These fossils indicate that after the Nantuo ice age, macroscopic multicellular organisms gradually increased in abundance and diversity. Simple, discoidal carbonaceous compres- sions such as chuarids are present in the initial macrofossil assemblage of the Doushantuo Stage. This assemblage was eventually replaceded by the more diverse Miaohe macrofossils, including unam- biguously branching forms, in the uppermost Dou- shantuo Formation. The new discovery of carbona- ceous compression macrofossils from the Doushan- tuo Formation in the Yangtze Gorges area provides new evidence for the correlation of late Neoprotero- zoic successions in southern China.Two new horizons with macroscopic fossils are reported in the Doushantuo Formation, Ediacaran System, from the Yangtze Gorges area. The fossils were discovered in the lower and middle black shales of the Doushantuo Formation in the new section at Sandouping Town, Zigui County, Hubei Province. The new macroscopic assemblages include Chuaria and Tawuia, and occur below the wellknown ＂Miaohe Biota＂. These fossils indicate that after the Nantuo ice age, macroscopic multicellular organisms gradually increased in abundance and diversity. Simple, discoidal carbonaceous compressions such as chuarids are present in the initial macrofossil assemblage of the Doushantuo Stage. This assemblage was eventually replaceded by the more diverse Miaohe macrofossils, including unambiguously branching forms, in the uppermost Doushantuo Formation. The new discovery of carbonaceous compression macrofossils from the Doushantuo Formation in the Yangtze Gorges area provides new evidence for the correlation of late Neoproterozoic successions in southern China.

关 键 词：三峡地区 古化石 页岩 湖北 

分 类 号：Q91[天文地球—古生物学与地层学]