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同层次实体界面上,通常存在着4种隔层,即细粒物质隔
层、泥砾隔
层、植物碎屑隔
层和成岩隔
层。