Nojimazaki Conglomerate Member

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Nojimazaki Conglomerate Member

Invalid synonym: Nojimazaki Tuffaceous Conglomerate Member

Type locality: Cape Nojima, Shirahama town, Minamiboso city, Chiba prefecture
Coherent formation
Trench fill sediments, Landward slope basin of trench
Deposition: late Pliocene
Andesite breccia: late Pliocene (3.0 Ma, K-Ar)

Sedimentary facies: Marine
Lithofacies: Breccia
Lithofacies (Gravel): Volcanic breccia
Lithofacies (Gravel, Minor): Plutonic rocks, Clastic rocks, Chert

Thickness: 50 m or thicker

Shirahama Formation
[ Upper ]
--------------
Nojima Conglomerate Member
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[ Lower ]

Chikura Group (Northern part)
[ Upper ]
?--?--?--?--?-
Negata Formation
--------------
Sagashi Formation
?--?--?--?--?-
[ Lower ]

Chikura Group
[ Upper ]
?--?--?--?--?-
Hata Formation
-------'''/,,,
Mera Formation
--------------
Shiramazu Formation
--------------
Shirahama Formation
?--?--?--?--?-
[ Lower ]

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

Distribution: Cape Nojima, Shirahama town, Minamiboso city, Chiba pref.
Fossils: Bivalves (Glycymeris yessoensis), Sharks (Teeth)

Utagawa et al. (2017) Jour. Geol. Soc. Japan, vol.123, no.11, pp.969-976 DOI
Kawakami and Shishikura (2006) Geology of the Tateyama District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 82p. (in Japanese with English abstract 5p.)