Four isolate barrier beds occurened usually in boundary surface of each internal architecture unit in channel sandbody, i. e. find bed, muddy pebble bed, plant clasts bed and diagenic bed.
在河道砂体内部的不同层次实体界面上,通常存在着4种
挡层,即细粒物质
挡层、泥砾
挡层、植物碎屑
挡层和
挡层。