土壤と母材,地形との關係について
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概要
- 論文の詳細を見る
General speaking, it is obvious that geologists have dealt with few attentions to the weathering products of country rocks or the soil parent materials, though they have sufficiently referred to the geological properties of rocks. Even in the dispersion method of mechanical analysis for unconsolidated or alluvial formations it is understood that it requires to stand on the colloid-chemical point of view in order to obtain desirable. dispersions. For instance, the soil materials from the B_2 horizons of Onji Type or the South-Western variety of the Ando Soils may be unable to peptize in usual alkaline but able to disperse in acidic one,. because of the positive charges of their colloidal fractions. Therefore, the sedimeotary petrology and the stratigraphy have particularly to co-operate with the dynamic soil science or the pedology in earring out the geological study of volcanic ashes and alluvial formations. Next, from some observations in a field suruey at Nakamura in Chiba Prefecture, it is found that three types of soil profile, such as the Half-Bog Soil and two sub-types of the Brown Lowland Soil according to the Kamoshita's classification, distribute on river terraces, upper and lower (See Figure given in the preceding Japanese part.) Their distributions are closely connected with the groundwater tables which are strongly influenced by the geomorphological development. This fact suggests that mutual relations between the relief and the other soil formers should further be investigated in detail.
- 地学団体研究会の論文
- 1950-03-26