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.
在河道砂体内部构成的不实体界面
,通常存在
4
挡
,即细粒物质
挡
、泥砾
挡
、植物碎屑
挡
和成岩
挡
。