秩父盆地の段丘堆積物に於ける砂の粒度分布について

抄録

At the Chichibu Pasln in Kanto District, the writer researched the size distribution of cementing matter in the fluvial terrace gravels. The results of mechanical analysis are shown in Figs. 1, 2, and Table 1.
The tendency of river development indicated by the size distribution and. the sorting of cementing matter has some resemblance to that presumed by the field observation of facies of each terrace deposit, which was reported in the previous paper.
It is probable that the results of such mechanical, analysis play be able to. shoe. the difference of river development and the environment, of deposition between the River Ara and Akahira at each stage of the formation of terrace plains.