Otone Formation

[ Top ] [ Japanese ]

Otone Formation

Coherent formation
Late Triassic, Norian

Sedimentary facies: Marine
Depth of water: Deeper
Lithofacies:

Thickness: 200 m or thicker

Okutone Group
[ Upper ]
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Kohoguchisawa Formation
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Hontaniyama Formation
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Kengakura Formation
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Oitsukkui Formation
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Otone Formation
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[ Lower ]

Okutone Group
[ Upper ]
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Higashimatasawa Formation
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Kengakura Formation
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Idosawa Formation
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Mizunagasawa Formation
--------------
[ Lower ]

Katashina Belt
[ Upper ]
/--/--/--/--/-
Tokurazawa Formation
/--/--/--/--/-
Iwamuro Formation
/--/--/--/--/-
Okutone Group
/--/--/--/--/-
[ Lower ]

Joetsu Belt
[ Upper ]
/--/--/--/--/-
Katashina Belt
/--/--/--/--/-
Tanigawadake Belt
/--/--/--/--/-
[ Lower ]

Maizuru Belt
[ North ]
/--/--/--/--/-
North zone
/--/--/--/--/-
Central zone
/--/--/--/--/-
South zone
/--/--/--/--/-
[ South ]

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

Distribution: Tone river - Kitamata river - Mount Ominakami - Mount Tango, Minakami city, Tone county, Gunma pref.

Chihara and Komatsu (1992) Geology of the Hakkaisan District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 107p. (in Japanese with English abstract 8p.)