Nishimatayama Formation

[ Top ] [ Japanese ]

Nishimatayama Formation Muraoka and Hase, 1990 ex Sumi et al., 1962

Type locality: upper reaches of Mitsumenai river, Owani city, Minamitsugaru county, Aomori prefecture
Accretionary complex
Trench-fill deposit
Accretion: Jurassic

Sedimentary facies: Marine
Depth of water: deeper than Carbonate Compensation Depth (ca. 4,500 m)
Lithofacies: Slate, Chert, Sandstone, Mafic tuff

Thickness: ca. 700 m
Upper limit: Unconformity (Manzaemonyama Formation)

Kuzumaki - Kamaishi Sub-belt (South Hirosaki, Aomori pref.)
[ Upper ]
/--/--/--/--/-
Owasawagawa Formation
?--?--?--?--?-
Nishimatayama Formation
?--?--?--?--?-
Mitsumenaigawa Formation
/--/--/--/--/-
[ Lower ]

North Kitakami Belt
[ Upper ]
/--/--/--/--/-
Kuzumaki - Kamaishi Sub-belt
/--/--/--/--/-
Akka - Tanohata Sub-belt
/--/--/--/--/-
[ Lower ]

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

Distribution: Mitsumenai river, Owani city, Minamitsugaru county, Aomori pref.; Origami creek - Ojigoku creek, Owani city, Minamitsugaru county, Aomori pref.

Ueda et al., (2009) Jour. Geol. Soc. Japan, vol.115, no.11, pp.610-613 DOI
Muraoka and Hase (1990) Geology of the Kuroishi District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 124p. (in Japanese with English abstract 8p.)