There are different sediment origins for Saximiao formation on both east and west sides of work area, shown in the distribution of feldspar content, carbonate rock cuttings and sandbody cycle.

• 工区东、西两边沙溪庙组具不同的物源沉积,表现在长石含量、碳酸盐岩屑和砂体旋回分布上。