1955 年 1955 巻 25 号 p. 1-3
Several research workers collaborated on the geology of the Ryoke Metamorphic Zone in Nagano Prefecure, Japan, with the special reference to the plutonism. The geological map of the Ryoke Zone of Central Japan (1:200,000) annexd to this report is compiled. This report includes the short history of the study of our group and the explanation on the compiled map.