摘要
在苏南孔山剖面和皖东太湖山剖面上泥盆统五通组观山段采集到痕迹化石11属13种,依据其组成和分布特征,将这些痕迹化石划分为两个组合,即Arenicolites组合和Palaeophycus组合.前者可归入Seilacher(1967)的Skolithos痕迹相,代表高能滨岸环境;后者可归入Cruziana痕迹相,代表正常浅海环境.对Palaeophycus组合进一步划分,区别出A、B两个亚组合.分析表明,亚组合B形成于比亚组合A稍远稍深的滨外环境,这一结论,与前人认为五通组为陆相沉积不同.
Thirteen species of eleven ichnogenera have been found in Upper Devonian Guanshan Member of Wutong formation from Kongshan section of Southern Jiangsu and Taihushan section of Eastern Anhui province.In terms of the composition and distribution features of the trace fossils,they can be divided into two associations:(1)Arenicdites association;(2)Palaeophycus association.The former falls in Seilacher′s Skolithos ichnofacies,occurring in high energy shoreline environment,and the latter is a part of Cruziana ichnofacies,representing normal shallow marine environment.Two sub associations,A and B are recognized from palaeophycus association,analyses of which indicate that sub association B occurs in deeper and more distal shoreface zone.The conclusion is different from the previous view that Wutong Formation is terrestrial deposit.
出处
《焦作工学院学报》
1998年第5期340-343,共4页
Journal of Jiaozuo Institute of Technology(Natural Science)
关键词
痕迹化石
痕迹相
五通组
泥盆系
地层
trace fossils
ichnofacies
Wutong formation
Devonian system