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在河北平原第四纪地层不同深发、一定层位的粘土-亚粘土层及淤泥-腐泥层中,普遍见到铁、锰结核的积聚。研究其形成条件,对恢复沉积环境、地层划分,以及对工程地质问题的评价等具有一定的现实和理论意义
The accumulation of iron and manganese nodules is commonly seen in the clay-sub-clay layers and silt-sapropelic layers of Quaternary strata in Hebei Plain that have different depths and depths. It is of practical and theoretical significance to study the formation conditions and to restore the sedimentary environment, stratigraphic division and evaluation of engineering geological problems