Abstract
Recentry, zeolite rock was found from the Neogene, Formation at Koriyama, Kago; shima prefecture. This formation had several similar characters as “Green Tuff” widely distributed in Tohoku district. This zeolite rock was almost composed of clinoptilolite and mordenite and associated with quartz, plagioclase, hypersthene, hornblende and biotite. This clinoptilolite was passibly Ca type one from its character of thermal behavior.
