Kanotsume Formation

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Kanotsume Formation Hatakeyama, 1954

Type locality: Kanotsume, Iwanomezawa, Yurihonjo city, Akita prefecture
Volcanic rocks
early Miocene (20.9, 19.0 Ma, K-Ar)
Contemporaneous heterotopic facies: Yashiozawakawa Formation
Correlation: Daijima Formation
Intruded by: Babame Dolerite

Lithofacies: Hyaloclastite
Lithofacies: Pyroxene andesite lava, Tuff breccia, Lapilli tuff, Volcanic breccia, Tuff
Lithofacies (Minor): Basalt lava, Acidic volcaniclastic rocks

Thickness: 200 - 450 m
Upper limit: Conformity (Hatamura Formation)
Lower limit: Conformity (Oyana Formation)

Honjo - Yashima, Akita pref.
[ Upper ]
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Onnagawa Formation
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Sugota Formation / Gongenyama Formation
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Hatamura Formation
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Kanotsume Formation / Yashiozawakawa Formation
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Oyana Formation
~~~~~~~~~~~~~~
Yamauchi Formation
?--?--?--?--?-
[ Lower ]

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

Distribution: Kanotsume, Iwanomezawa, Yurihonjo city, Akita pref.; Mount Ryuba - Otomo pass - Mount Toko - Mount Hisumi - Mount Onikura, Yurihonjo city, Akita pref.; Okugasawa, Yamauchi, Yurihonjo city, Akita pref.

Nishikawa et al. (2008) Jour. Geol. Soc. Japan, vol.114, Supplement, pp.75-85 DOI
Ozawa et al. (1988) Geology of the Yashima District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 87p. (in Japanese with English abstract 5p.)
Ozawa et al. (1977) Geology of the Honjo District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 54p. (in Japanese with English abstract 4p.)