Shimoyamaguchi Sandstone and Conglomerate Member

[ Top ] [ Japanese ]

Shimoyamaguchi Sandstone and Conglomerate Member Akamine et al., 1956

Type locality: Goyoteikaigan, Shimoyamaguchi, Hayama city, Miura county, Kanagawa prefecture
Coherent formation
Late Miocene - Early Pliocene
Correlation: Tagoegawa Sandstone and Conglomerate Member

Sedimentary facies: Shallow marine
Climate: Warm (Fossils)
Lithofacies: Tuffaceous sandstone
Lithofacies (Minor): Calcarenite, Calcirudite, Calcilutite, Tuff, Interbedded tuffaceous sandstone and mudstone

Thickness: 0 - 130 m
Lower limit: Tagoegawa Unconformity (Oyama Formation)

Zushi Formation (North)
[ Upper ]
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Tagoegawa Sandstone and Conglomerate Member
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[ Lower ]

Zushi Formation (Central - South)
[ Upper ]
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Shimoyamaguchi Sandstone and Conglomerate Member
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[ Lower ]

Miura Group (Northern Miura peninsula)
[ Upper ]
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Ikego Formation
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Zushi Formation
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[ Lower ]

Mineoka Belt (Miura peninsula)
[ Upper ]
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Miura Group
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Hayama Group
?--?--?--?--?-
[ Lower ]

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

Distribution: Shimoyamaguchi - Cape Chojagasaki - Hikage, Hayama city, Miura county, Kanagawa pref.; Cape Senda - Kumura - Nagasaka - Take - Nagasawa - Nobi seashore, Yokosuka city, Kanagawa pref.
Fossils: Shellfishes, Balanus sp., Flabellum sp., Calcareous algae, Bryozoans
Fossils (Foraminifera): Amphistegina radiata, Globigerina sp.

Eto et al. (1998) Geology of the Yokosuka District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 128p. (in Japanese with English abstract 3p.)