Abuzuru Formation

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Abuzuru Formation Minashi and Yazaki, 1968

Invalid synonym: Hatatateyama Formation, Toneyama Formation

Type locality: Abuzuru seashore, Hayama city, Miura county, Kanagawa prefecture
Accretionary complex
Miocene

Sedimentary facies: Marine
Lithofacies: Interbedded tuffaceous sandstone and mudstone
Sedimentary structures: Slump structures

Thickness: 280 - 570 m
Upper limit: Transitional (Oyama Formation)
Lower limit: Transitional (Morito Formation)

Abuzuru Formation
[ Upper ]
~~~~~~~~~~~~~~
Tateishi Tuff Member
--------------
[ Lower ]

Hayama Group
[ Upper ]
~~~~~~~~~~~~~~
Yabe Formation
::::::::::::::
Kinugasa Formation
/--/--/--/--/-
Oyama Formation
--------------
Abuzuru Formation
--------------
Morito Formation
?--?--?--?--?-
[ Lower ]

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

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

Distribution: Abuzuru seashore - Teramae - Osawa - Manase, Hayama city, Miura county, Kanagawa pref.; Akiya - Osaku - Take - Takyama - Mount Miurafuji - Idoishi, Yokosuka city, Kanagawa pref.
Fossils (Foraminifera): Cibicides sp.
Fossils (Radiolarians): Cyrtocapsella tetrapera

Takahashi et al. (2016) Jour. Geol. Soc. Japan, vol.122, no.8, pp.375-395, 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.)