Ibo Formation

[ Top ] [ Japanese ]

Ibo Formation Yamamoto et al., 2000

Type locality: Nishiyama park, Shingu, Shingu town, Tatsuno city, Hyogo prefecture
Volcanic rocks
Late Cretaceous
Intruded by: Granodiorite, Diorite porphyry

Sedimentary facies: Caldera-fill deposit
Lithofacies: Andesite pyroclastic flow deposit
Lithofacies: Welded lapilli tuff

Thickness: ca. 300 m
Distribution (East - West): 8 km
Distribution (South - North): 6 km
Upper limit: Unconformity (Hayashida Formation, Matobayama Formation, Yumesaki Formation)

(Invalid name) Ikuno Group (Tatsuno, Hyogo pref.)
[ Upper ]
~~~~~~~~~~~~~~
Yumesaki Formation
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Matobayama Formation
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Ise Formation
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Shinokubi Formation
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Fukusaki Formation
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Hayashida Formation
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Ibo Formation
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Hiromine Formation
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[ Lower ]

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

Distribution: Shingu - Umatate - Kameyama, Shingu town, Tatsuno city, Hyogo pref.

Yamamoto et al. (2002) Geology of the Yamasaki District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 48p. (in Japanese with English abstract 4p.)
Yamamoto et al. (2000) Geology of the Tatsuno District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 66p. (in Japanese with English abstract 5p.)