HI-B Tephra

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HI-B Tephra

Abbr.: HI-B

Type locality: southern coast of Hiraiso fishing harbour, Chikura town, Minamiboso city, Chiba prefecture
Tephra
Pliocene

Lithofacies (Upper): Scoriaceous sands
Lithofacies (Lower): Tuffaceous silt

Host: Shiramazu Formation
Thickness (Upper): 5 - 6 cm
Thickness (Lower): 4 - 6 cm

HI Tephra
[ Upper ]
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HI-A Tephra
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HI-B Tephra
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HI-C Tephra
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[ Lower ]

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

Distribution: southern coast of Hiraiso fishing harbour, Chikura town, Minamiboso city, Chiba pref.

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.)