古扇

在洪泛平原区，对古溃口扇采用沉积学、地球物理学方法研究其沉积结构，对确定古洪水事件具有积极意义；

The study of the depositional structure of ancient crevasses splays by means of sedimentology and paleomagnetism is important for the floodplain .

鱼台组为黄河古决口扇前缘洼地沉积，岩性为一套棕红色粘土，局部夹粉砂土。

Yutai formation is frontal depression sedimentary of Yellow river old crevasse splay , and its property is brown-red clay , accompanying with silt .

单县组为黄河古决口扇、古河道沉积，岩性主要为细砂、粉砂；

Shanxian formation is old crevasse splay and old channel sedimentary of the Yellow river , and its propery is mainly fine silt and silt ;

古构造对扇三角洲沉积体系的控制作用主要表现在：（1）主要基底断裂控制了扇三角洲的展布方向；

The constrains of the ancient structures on the development of fan deltas of the Yingcheng Formation are represented by : ( 1 ) the extension direction of the fan deltas were controlled by the main ancient faults ;