摘要
滦河三角洲地区现代沉积环境类型多,分布紧凑,生物繁盛,是进行沉积学和痕积学研究的理想场所.最近考察发现.滦河三角洲各种沉积环境单元一般均有特征的痕迹形态或痕迹组合.滦河三角洲上大致可划分出三个环境带,每个带中的生物痕迹在组成、大小、分异度和丰度等方面有明显差异.此外,在各种环境里出现的所有的痕迹中,还识别出三个重现的痕迹组合,并在文中讨论了控制生物痕迹分布的环境因素.
The Luanhe River Deltaic Area may be reckoned as a natural workshop for sedimentological and ichnological study with its diverse modern sedimentary environments and traces left by animals. Many subunits can be recognized on the accessible subaerial part of the Luanhe River Delta,each has its own trace morphologies or trace associations.Generally,the delta can be divided into three zones,each contains a suit of traces that is different from the others in composition,size of traces,diversity,and abundance.Three recurring ichnococnoses and controlling factors on the distribution of traces are described and dis- cussed in this paper.
关键词
三角洲
沉积环境
生物痕迹
滦河
delta
modern sedimentary environments
traces
ichnocoenosis
controlling factor
