地层层位 meaning in English

stratigraphic horizon

Many domestic and overseas cases of surface subsidence and damage induced by underground water mining are enumerated in this paper and the surface subsidence mechanism induced by underground water mining is analyzed from the location of water - bearing stratum , physical characteristics of carrier , drifting manners and subsidence styles
摘要列举了国内地下水开采造成地表沉陷和损害的许多实例，并从地下水所处的地层层位、载体物性、载体厚度、抽排方式和沉陷类型入手，分析了地下水开采地表沉陷发生机理。