Hasumi Formation

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Hasumi Formation Matsuura, 1990

Accretionary complex
Cretaceous - Permian
Intruded by: Shikijiki Granite, Mitsumori Granite, Kuchiwa Diorites

Sedimentary facies: Marine
Lithofacies:

Thickness: ca. 850 m
Distribution (East - West): ca. 13 km
Distribution (South - North): ca. 3 km
Upper limit: Unconformity (Takada Rhyolites, Bihoku Group)

Hasumi Formation
[ Upper ]
/--/--/--/--/-
Uegahata Shale Member
--------------
Togochi Sandstone Member
/--/--/--/--/-
[ Lower ]

------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown

Distribution: Togochidao pass, Onan city, Ochi county, Shimane pref.; Kamisakugi - Kumami, Miyoshi city, Hiroshima pref.

Matsuura (1990) Geology of the Akana District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 73p. (in Japanese with English abstract 5p.)