The formation mechanism for deposit slope is as follows: on account of joints and weathering, the dip direction of top stratums is opposite to the slope, which results in toppling and falling.

• 提出了堆积体边坡的成因机制：由于裂隙切割、风化作用等，上部倾向山里的基岩发生倾倒、崩塌破坏；