Komami Siliceous Shale Member

[ Top ] [ Japanese ]

Type locality: Komami, Yamato town, Gujo city, Gifu prefecture
Accretionary complex
Deposition (Siliceous shale): Middle Jurassic (Radiolarins)

Sedimentary facies: Marine
Lithofacies: Coherent facies
Lithofacies: Siliceous shale, Mudstone
Lithofacies (Minor): Sandstone, Chert

Thickness: 100 - 800 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 (Mount Funabuseyama area)
[ 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: Komam - Shimofurumichi - Kamikanjii, Yamato town, Gujo city, Gifu pref.; Fukazara - Ishihara, Hachiman town, Gujo city, Gifu pref.; Hokiguchi - Sugihara, Itadori, Seki city, Gifu pref.
Fossils (Radiolarians): Angulabracchia sp., Archaeodictyomitra spp., Archaeospongoprunums p., Canoptum sp., Dictyomitrella? kamoensis, Emiluvia sp., Eucyrtidium? unumaensis, Foremania sp., Gorgansium spp., Hsuum maxwelli, Napora sp., Pachyoncus sp., Pantanellum sp., Paronaella sp., Pratunuma fusiformis, Spongosaturnalis? hexagaonus, Stichocapsa japonica, Tricolocapsa oconvexa, Tricolocapsa plicarum, Tricolocapsa cf. tuesti, Trillus spp., Trilonche? ordinaria, Tritrabs cf. ewingi, Unuma echinatus, Zartus sp.

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