The lahar deposits of the 1 000 a B.
长白山火山１０００年前大喷发，火山泥流堆积物沿松花江中上游分布。
Pyroclastic deposits mainly can be devided into four types, fallout tephradeposits,pyroclastic flow deposits,lahar deposits and volcanic base surge deposits.
火山喷发碎屑堆积物主要分为：火山喷发空中降落堆积物、火山碎屑、流状堆积物、火山泥流堆积物和火山基浪堆积物。
The volcanic mud-rock flow in the middle Pleistocene,Tumenjiang drainage area is only distributed on the residual Ⅲ terrace,the distribution of grain size is very wide,showing normal grading stratification,poorly sorting,formed by the fast transporting and sedimentation in glacial action and glacisolifluction,which shows a sedimentary model of turbidite.
图们江流域中更新世火山泥石流仅分布在残留的Ⅲ阶地上,碎屑物的粒级范围很广,具正粒序层理,分选差,是在冰川作用或冰雪融化作用下快速搬运、沉积形成的,具有浊积岩的沉积模式。
The Tianchi volcano occurred many land floods and volcanic mud-rock flows,so,large quantities of accumulation can be discovered by these events along the Songhuajiang River,Yalujiang River and Tumenjiang River drainage area.
天池火山曾经发生过很多次洪水泛滥与火山泥石流,沿着松花江、鸭绿江、图们江三江水系两岸保存有很多它们的遗迹。