A new point has been brought forward that specific environment has caused occurrence of branched fluvial domain and fluvial overflow lacustrine sedimentation, presenting features of multi-sources and multi deposit centers. 并提出了特殊环境使河流体系下游出现枝状河流域和河漫湖沉积,呈现多物源、多沉积中心沉积特征的新观点。