Imaizumi Sandstone and Conglomerate Member

Imaizumi Sandstone and Conglomerate Member Suzuki and Kitazaki, 1951

Coherent formation
Fore-arc basin sediments (Kazusa trough)
Pleistocene
Correlation: Hayashi Formation

Sedimentary facies: Marine
Lithofacies: Sandstone, Conglomerate

Thickness: ca. 160 m
Upper limit: Conformity
Lower limit: Conformity

Nojima Formation
[ Upper ]
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Upper part
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Imaizumi Sandstone and Conglomerate Member
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[ Lower ]

Kazusa Group (south Tama hills)
[ Upper ]
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Hama Formation
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Nakazato Formation
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Koshiba Formation
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Ofuna Formation
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Nojima Formation
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Urago Formation
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Fukazawa Formation
~~~~~~~~~~~~~~
[ Lower ]

Kazusa Group (northern Miura peninsula)
[ Upper ]
~~~~~~~~~~~~~~
Tomioka Formation
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Nakazato Formation
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Koshiba Formation / Kamihoshikawa Formation
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Ofuna Formation
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Nojima Formation
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Urago Formation
~~~~~~~~~~~~~~
[ Lower ]

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

Distribution: Imaizumi, Kamakura city, Kanagawa pref.; Sakae-ku, Yokohama city, Kanagawa pref.; Kuden town, Totsuka ward, Yokohama city, Kangawa pref.
Fossils: Megacardita ferruginosa (Adams and Reeve), Limopsis tokaiensis Yokoyama, Acila minutoides Kuroda and Habe, Limatula strangei (Sowerby), Indocrassatella oblongata (Yokoyama), Scapharca satowi (Dunker), Lima zushiensis Yokoyama, Gemmula sp., Olivella japonica Pilsbry, Conchocele bisecta (Conrad), Calyptogena (Archivesica) kawamurai (Kuroda)

Utsunomiya et al. (2014) Jour. Geol. Soc. Japan, vol.120, no.7, pp.221-231 DOI
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.)