Abstract
Late Devonian Leptophloeum has been obtained from the coherent strata in the Kurosegawa Belt in eastern Tomochi Town, central Kyushu. This reveals that the Upper Devonian formation extends in the E-W direction the south side of Usuki-Yatsushiro Tectonic line. This Upper Devonian is compared with the "Naidaijin Formation" which occupies the eastern part of the district. It is not connected with the "Naidaijin Formation" and they are arranged in two zones with E-W trend. The Upper Devonians in Japan which yields Leptophloeum are divided into two types of facies : one is mudstone facies, the other is acidic tuff facies. The Upper Devonian in the Tomochi district belongs to the former.
