clast

The tempestite and non-tempestite occur alternately in vertical section.The development of tempestite is related to stratum, ancient landfom and water depth, tectonic location and clast supply.

在剖面上，风暴沉积与非风暴沉积交互出现，发程度与层位、古地形、古水深、位置及碎屑供给特征等条件有关；

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.

在河道砂体内部不同层次实体界面上，通常存在着4种隔挡层，即细粒物质隔挡层、泥砾隔挡层、植物碎屑隔挡层和岩隔挡层。