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Kurohime Formation Niigata College attached high school Chigakubu, 1978

• Type locality: Mochiro creek, Kashiwazaki city, Niigata prefecture
• Volcanic rocks
• early Pliocene
• Contemporaneous heterotopic facies: upper Tamugigawa Formation
• Interfingered: Suganuma Formation
• Correlation: Nishiyama Formation, Yoneyama Formation, Hachikokusan Formation

• Lithofacies (Upper): Interbedded sandsgtone and mudstone, Siltstone
• Lithofacies (Upper, Minor): Hornblende pyroxene andesite tuff breccia, Volcanic conglomerate
• Lithofacies (Lower): Olivine-bearing pyroxene andesite lava (Hyaloclastite), Volcanic breccia, Tuff breccia, Lapilli tuff, Volcanic sandstone, Siltstone
• Lithofacies (Lower, Minor): Hornblende pyroxene andesite, Volcanic breccia, Tuff breccia, Lapilli tuff, Volcanic sandstone, Mudstone

• Thickness: 165 - 700 m
• Upper limit: Conformity (Higashigawa Formation, Asojima Formation)
• Lower limit: Conformity, partly unconformity (Tamugigawa Formation)

• Distribution: Mochiro creek, Kashiwazaki city, Niigata pref.; Mount Kurohime - Nishinoiri river, Kashiwazaki city, Niigata pref.; Isonobe - Mount Otokoyama, Takayanagi town, Kashiwazaki city, Niigata pref.
• Fossils (Foraminifera): Globigerina bulloides, Globigerina falconensis, Globigerina foliata, Globigerina incompta, Globigerina pachyderma, Globigerina quinqueloba, Globigerina rubescens, Globigerina umbilicata, Globigerinita glutinata, Globigerinita uvula, Globorotalia cf. crassaformis, Globorotaria inflata praeinflata, Globorotalia orientaris, Globorotalia cf. praescitula, Neogloboquadrina asanoi, Neogloboquadrina kagaensis

• Kobayashi et al. (1989) Geology of the Okanomachi District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 112p. (in Japanese with English abstract 5p.)