And the boundary of them has the same lithologiccharacter: the ravinement surface of river course or exposure mudstone of flooding plain and root clay.
二者的界面是相同的，均为河道砂体底部的冲刷侵蚀面或者是暴露过泛滥平原泥岩、根土岩等。
2
The extensive development of the lateral accretions of continental strata leads to the horizontal variation of lithologiccharacter and lithologic facies.
陆相地层侧向加积作用广泛发育，导致岩性、岩相横向多变。
3
In vertical, from E31 to E32, it changes from braided river delta to a shallow lake facies, thus, formed a cycle which lithologiccharacter is rough at bottom.