Hikawa Formation

[ Top ] [ Japanese ]

Hikawa Formation Ogasawara and Nomura, 1980

Type locality: Naoe, Hikawa town, Izumo city, Shimane prefecture
Coherent formation
Miocene
Correlation: Matsue Formation

Sedimentary facies: Shallow marine, Brackish
Lithofacies: Sandstone
Lithofacies (Minor): Siltstone, Mudstone, Interbedded mudstone and sandstone, Lignite
Sedimentary structures: Low-angle trough cross-stratification, Wave ripples

Thickness: 150 m or thicker
Lower limit: Conformity (Fujina Formation)

southern Izumo, Shimane pref.
[ Upper ]
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Jinzai Formation
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Hikawa Formation
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Fujina Formation
-------~~~~~~~
Omori Formation
~~~~~~~~~~~~~~
Kuri Formation
'''''''/,,,,,,
Kawai Formation
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Hata Formation
~~~~~~~~~~~~~~
Sada Formation
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[ Lower ]

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

Distribution: Naoe, Hikawa town, Izumo city, Shimane pref.
Fossils: Plants, Trace fossils (Ophiomorpha isp.)

Kano (2018) Jour. Geol. Soc. Japan, vol.124, no.10, pp.781-803 DOI
Kano et al. (1991) Geology of the Imaichi District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 79p. (in Japanese with English abstract 5p.)