HsdF developed the fining-upward sequences , and alluvial fan in the early stage , floodplain and crevasse splay and fan-delta in the middle stage , and lacustrine turbidites in the late stage.

• 黑石渡组属于向上变细层序,早期为冲积扇沉积,中期为洪泛平原、决口扇和扇三角洲沉积,晚期为深湖浊流沉积。