Aburatsubo Pyroclastic Rock Member

[ Top ] [ Japanese ]

Aburatsubo Pyroclastic Rock Member (Akamine et al., 1956)

Coherent formation
Pliocene (ca. 5 - 3 Ma)

Sedimentary facies: Marine
Lithofacies: Pyroclastic rock dominant interbedded sandy siltstone/silty sandstone and scoria/scoriaceous tuff

Thickness: 100 - 150 m
Upper limit: Conformity (Hatsuse Formation)
Upper limit: Bottom of Sj22 Tephra Bed

Misaki Formation
[ Upper ]
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Aburatsubo Pyroclastic Rock Member
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Lower part
?--?--?--?--?-
[ Lower ]

Miura Group (Southern Miura peninsula)
[ Upper ]
~~~~~~~~~~~~~~
Hatsuse Formation
--------------
Misaki Formation
?--?--?--?--?-
[ Lower ]

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

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

Distribution: Sajima, Yokosuka city, Kanagawa pref.
Tephra: So

Mori and Ogawa (2019) Jour. Geol. Soc. Japan, vol.125, no.10, pp.737-757 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.)
Kodama et al. (1980) Geology of the Misaki District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 38p. (in Japanese with English abstract 3p.)