Fossa Magna

Fossa Magna is a great rift lowland in Japan. It is often confused with the Itoigawa-Shizuoka Tectonic Line. However, Itoigawa-Shizuoka Tectonic Line is a line; Fossa Magna is an area. Fossa Magna is Latin for "great crevasse". This name was given by Heinrich Edmund Naumann.