b1 Member

[ Top ] [ Japanese ]

b1 Member

Synonym: U-IIb1

Coherent formation
Late Cretaceous, Campanian

Sedimentary facies: Marine
Lithofacies: Mudstone

Thickness: 100 m
Upper limit: Conformity
Lower limit: Conformity

b Member
[ Upper ]
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b3 Member
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b2 Member
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b1 Member
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[ Lower ]

U-II Formation
[ Upper ]
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b Member
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a Member
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[ Lower ]

Himenoura Group (Koshikijima islands)
[ Upper ]
~~~~~~~~~~~~~~
U-IV Formation
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U-III Formation
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U-II Formation
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U-I Formation
?--?--?--?--?-
[ Lower ]

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

Distribution: Shimokoshikijima island, Koshikijima islands, Satsumasendai city, Kagoshima pref.

Tonai et al. (2008) Jour. Geol. Soc. Japan, vol.114, no.11, pp.547-559 DOI