龍汗段狀地의 鐵穀 硏究

Abstract

Many ferruginous crusts are observed on the Yong-Han platform. This paper aims to classify Those crusts and to make clear their forming processes. To accomplish these works, the field observations and the chemical analyses were practiced.

The outcrops containing ferruginous crusts are observed here and there on the Yong-Han area. The ferruginous crusts are usually situated in the deposits as parts of hem. In many cases in those outcrops, compounds of manganese or calcium are contained and well sorted deposits of clay, of silt, and of sand, and of sandy gravel. The ferruginous crusts now and then appear on the yellow sandy earth. The altitudes at which the ferruginous crusts occur are discrete. The higher altitudes the silty gravels are located at, the more they are weathered.