Fukazara Sandstone and Mudstone Member

[ Top ] [ Japanese ]

Fukazara Sandstone and Mudstone Member

Type locality: Fukazara, Hachiman town, Gujo city, Gifu prefecture
Accretionary complex
Middle Jurassic

Sedimentary facies: Marine
Lithofacies: Coherent facies
Lithofacies: Interbedded sandstone and mudstone
Sedimentary structures: Gradded bedding, Parallel stratification, Convolute lamination, Groove marks, Bounce marks
Paleocurrent: from Northwest to Southeast

Thickness: 500 - 1,000 m

Kodaragawa Formation
[ Upper limit ]
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Fukazara Sandstone and Mudstone Member
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Komami Siliceous Shale Member
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Tokunaga Sandstone Member = Funafuseyama Unit
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[ Lower limit ]

Samondake Unit (Hachiman, Gifu pref.)
[ Upper ]
/--/--/--/--/-
Kajika Formation
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Kodaragawa Formation
/--/--/--/--/-
[ Lower ]

Mino Belt (Mino, Gifu pref.)
[ Upper ]
/--/--/--/--/-
Sakamototoge Unit
/--/--/--/--/-
Samondake Unit
/--/--/--/--/-
Kamiaso Unit
/--/--/--/--/-
Funafuseyama Unit
/--/--/--/--/-
Nabi Unit
/--/--/--/--/-
Kanayama Unit
/--/--/--/--/-
Kuze Unit
/--/--/--/--/-
[ Lower ]

Mino Belt (Gifu pref. - Shiga pref.)
[ Upper ]
/--/--/--/--/-
Kashimagari Unit
/--/--/--/--/-
Samondake Unit
/--/--/--/--/-
Funafuseyama Unit
/--/--/--/--/-
Kuze Unit
/--/--/--/--/-
[ Lower ]

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

Distribution: Fukazara, Hachiman town, Gujo city, Gifu pref.; Komami - Shimofurumichi - Kamikanji, Yamato town, Gujo city, Gifu pref.
Fossils: Wood fragments
Fossils (Radiolarians): Archaeodictyomitra spp., Archaeospongoprunum spp., Dictyomitrella? kamoensis, Pantanellum foveatum, Spongonaturnalis? suboblongusTricolocapsa? fusiformis, Tricolocapsa plicarum

Wakita (1984) Geology of the Hachiman District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 89p. (in Japanese with English abstract 6p.)