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Relatively conformable depositional units bounded by surfaces of Marine flooding, surfaces that separate older strata from younger and show an increase in water depth in successively younger strata.
以海泛滥面为界的相对整合的沉积单位，海泛面分隔较老地层与较年轻地层并显示在连续的地较年轻地层中水深的增大。
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