Intermittent flood crevasse is the main factor in the formation to Wencunjia crevasplayi adeep crevasse pond and the directional extansion of braided channels passing by hills and holows is the important geomorphic feature of the crevasse splay.The sediments of the splay are primarily graded-suspension transported.Sediments in water channels hawe distinct binary texture

but the binary texture of the sediments between the channels are not clear.This has resulted in fine sediments of the former than the later in the upper parts. The maim sedimentary structures include large scale of wash-filling bedding

trough cross bedding

Parallel bedding

sand ripple

homogeneous bedding.As for its grain size curves

type-Ⅰ is usually coarse and well-sorted

representing sediments deposted in lower parts of braided channels in the root and central parts of the splay;type-Ⅱ is relatively fine and better sorted

representing sediments deposited in the lower parts of the root and central sections of the splay between the channels

type-Ⅲ is fine but poor sorted.representing sediments in.splay margin. In consideration to the above mentioned

three sub factes such as deep pond

main body and margin subfacies have been subdivided.