The results have shown that two kinds of beach bars formed in shallower water environment in weak tectonic activity period and have high degree of compositional maturity and textural maturity.

• 结果表明,两种滩坝均发育在构造运动平缓时期的浅水地区,具有较高的成分成熟度和结构成熟度。砂质滩坝主要发育在陆源碎屑物质供应充分的沙三段上部并可进一步划分出五种微相。