Permalink : http://hdl.handle.net/2115/36661

Permian calcareous algae Gymnocodium bellerophontis and Mizzia velebitana were found in an algal limestone bed intercalated in the Matsumae Group exposed at the upper stream of Komatagawa River, about 5 km northwest of Fukushima town, Southwestern Hokkaido. The limestone is intercalated within the alternation of greenish gray basaltic tuff and slate, and the whole sequence is continuous at least about 2 km along its strike direction. Considerable part of the Matsumae group may be assigned to Permian in age.