Biroku Formation

[ Top ] [ Japanese ]

Biroku Formation (Matsui, 1943)

Type locality: Biroku, Tado town, Kuwana city, Mie prefecture
Coherent formation
Fluvio-lacustrine basin including Lake Tokai
Pliocene

Sedimentary facies: Fluvial
Sedimentary facies: Small-scale alluvial fan
Sedimentary facies: Debris flow deposit, Talus deposit
Sedimentary facies: Gravelly fluvial
Sedimentary facies: Basal conglomerate
Lithofacies: Breccia
Lithofacies (Minor): Sands, Silt, Lignite
Sedimentary structures: Channel structure, Cross stratification
Paleocurrent: from Northeast to Southwest

Thickness: ca. 4 - 65 m
Upper limit: Interfingered (Kono Formation), Transitional (Tashidagawa Formation)
Lower limit: Abut unconformity (Mino Belt)

Tokai Group (Inabe, Mie pref.)
[ Upper ]
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Komeno Formation
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Oizumi Formation
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Ichinohara Formation / Kuragari Formation

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Kono Formation

'''''''/,,,,,,

Biroku Formation

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[ Lower ]

Tokai Group (Mount Gozaishoyama, Mie pref.)
[ Upper ]
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Komeno Formation
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Oizumi Formation
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Tashidagawa Formation
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Kono Formation
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Ishigure Formation
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Biroku Formation
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[ Lower ]

Second Setouchi Supergroup (Mie pref. - Aichi pref.)
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Tokai Group
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[ Upper ]
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Second Setouchi Supergroup
?--?--?--?--?-
First Setouchi Supergroup
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[ Lower ]

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

Distribution: Biroku, Tado town, Kuwana city, Mie pref.; Koharaisshiki - Gobetto - Senjigureshinden - Kitanakatsuhara - Ichinohara - Akechigawa river, Hokusei town, Inabe city, Mie pref.; Yatsubo valley, Tado town, Kuwana city, Mie pref.

Yoshida et al. (1991) Geology of the Kuwana District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 154p. (in Japanese with English abstract 5p.)
Harayama et al. (1989) Geology of the Gozaishoyama District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 145p. (in Japanese with English abstract 6p.)
Yoshida (1984) Geology of the Yokkaichi District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 81p. (in Japanese with English abstract 5p.)
Takada et al. (1979) Geology of the Tsushima District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 56p. (in Japanese with English abstract 5p.)