Geomorphic and geologic features of its drainage basin shows that larger accommodation space formed by uplift of Luliang mountain possibly led to sheetflood deposits on FengYG alluvial fan.

• 风峪沟冲积扇流域的地质地貌特征表明，由于该段吕梁山地较大幅度的抬升给冲积扇的发育提供了充分的可容空间，这可能是风峪沟冲积扇上片流沉积物发育的主要原因。