（4）冲积物(alluvial deposit) 河水中挟带的泥沙，在中下游两岸与入海口沉积而成。它的分布 范围广，面积大，所有的江河，在其中下游两岸都有这种母质分布。
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piedmont alluvial deposit 山麓冲积物
loess alluvial deposit 黄土覆盖层
deep alluvial deposit 深厚覆盖层
alluvial fan deposit 冲积扇层 ; 冲积扇沉积
alluvial ore deposit [地质] 冲积矿床
river alluvial deposit 河流冲积物
mining alluvial deposit 冲积层下采煤
以上来源于: WordNet
Placer tin deposit in xupu occurs in alluvial sediment of quatemary system and cassiterite chiefly concentrates at the bottom of gravel layers.
溆浦砂锡矿床赋存在第四系冲积层中锡石主要富集在底部砂砾石层。
Separated from the deposit and scattered on the river side of the foundation rock, and gradually be covered with sand, forming alluvial sand.
自矿床分离而散落于溪旁基础岩石上，逐步被沙土覆盖，形成冲积性砂。
By the study of the feature of alluvial gold conjuncture, its haul distance was determined, the types of its Primary deposits assessed and the target area for ProsPecting Primary deposit defined.
介绍了研究砂金连生体特性，借以确定砂金的搬运距离、判断原生金矿床类型并进行预测，以及确定原生金矿靶区的应用范例。
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