Shigekuradake Conglomerate Formation

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Shigekuradake Conglomerate Formation

Type locality: Mount Shigekura, Yuzawa city, Minamiuonuma county, Niigata prefecture - Minakami city, Tone county, Gunma prefecture
Coherent formation
Roof pendant
Miocene
Intruded by: Quartz diorite

Lithofacies: Conglomerate
Lithofacies (Minor): Basalt lava, Tuff, Shale, Sandstone, Dacite Tuff breccia, Lapilli tuff, Rhyolite lava

Thickness: ca. 250 m
Upper limit: Conformity (Daishojinokashira Basalt Formation)
Lower limit: Unconformity (Serpentinite, Mesozoic strata)

Tanigawa mountains, Niigata pref.
[ Upper ]
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Akaya Shale Formation
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Sennokura Pyroclastic Rock Formation
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Mantaroyama Shale Formation
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Daishojinokashira Basalt Formation
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Shigekuradake Conglomerate Formation
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[ Lower ]

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

Distribution: Mount Shigekura - Mount Ichinokura - Ojikazawanokashira - Manaitagura - Kawadananokashira, Yuzawa city, Minamiuonuma county, Niigata pref. - Minakami city, Tone county, Gunma pref.

Chihara et al. (1981) Geology of the Echigo-Yuzawa District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 108p. (in Japanese with English abstract 8p.)