Shuanghe fan delta was high construction composite depositing body.Because the source material and the water stream were steady, the body presented a receding overlain deposition successively.

• 双河扇三角洲为高建设型的扇三角洲复合体,由于物源、流向比较稳定,继承性和规律性较强,总体表现为下大上小的迭瓦状退复式沉积。