释文：重力水流不能透过的土层或岩层。如粘土、重亚粘土以及致密完整的页岩、火成岩、变质岩等。
n. aquiclude
misc. water-resisting layer ; confining bed
不渗透的岩层都称为隔水层。
淮北临涣矿区的冲积层由三个隔水层和四个含水层组成。
The alluvial of Linhuan mine area in Huaibei consists of tour aquifers with three water resisting layers.
目前，在地下水开发工作中，国内不少地区有泥灰岩作为隔水层或弱透水层。
At present, in the work of groundwater exploitation marlite has been regarded asaquiclude or bad permeable stratum in many internal areas in China.
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