Badong Formation is the result of continental-oceanic interactive facies sedimentary and Zigui basin is the result of intra-continental basinal depositing.

• 下部巴东组总体为海陆交互相沉积，而秭归盆地则转为内陆盆地沉积。该界面性质的确定为研究秭归盆地形成与演化提供了基础。