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Kurehayama Gravel Bed (Imamura, 1932) Fujimoto and Sakamoto, 1961

• Type locality: Anyobo - Mount Kureha, Toyama city, Toyama prefecture
• Coherent formation
• late Pliocene - middle Pleistocene

• Sedimentary facies: Fluvial
• Sedimentary facies: Alluvial fan
• Lithofacies: Gravel-bearing sand
• Lithofacies (Lower, Minor): Sand, Gravel, Mud, Tuff, Lignite

• Thickness: A few dozen - 500 m
• Higher limit: Unconformity (Togechaya Gravel, Sand and Mud Alternation Member, Higher Dissected Fan Deposits, Tomosaka Gravel Bed)
• Lower limit: Unconformity (Mita Formation, Muroda Formation, Chokeiji Sand Member, Kamidaki Sandstone Member)

• Distribution: Shiraiwa - Omatsushin - Hinaka - Suyama - Kakizawa, Kamiichi city, Nakaniikawa county, Toyama pref.; Anyobo - Mount Kureha - Kurokawa - Yasuda - Fukuzawa, Toyama city, Toyama pref.; Mikage - Shakado - Masuda - Mount Tenjinyama - Miyazu, Uozu city, Toyama pref.; Shogonji, Tonami city, Toyama pref.; Mita - Takakuma - Jono, Yatsuo town, Toyama city, Toyama pref.; Osedani - Yoshizumi, Fuchu town, Toyama city, Toyama pref.; Amidado - Nakajin, Kurobe city, Toyama pref.; Tofukuji, Namegawa city, Toyama pref.; Seto - Uwazue, Tateyama city, Nakaniikawa county, Toyama pref.
• Fossils (Plants): Corylus heterophylla var. thunbergii, Cryptomeria japonica, Fagus crenata, Quercus? sp., Sciadopitys verticillata
• Tephra: pt (0.5 - 0.3 Ma, TL, 0.72 - 0.68 Ma, ESR = KMT), Taniguchi Tuff, Maruyama 1 Tephra, Maruyama 2 Tephra (Mry2, UN-MD2, 2.65 Ma)

• Nakajima et al. (2019) Jour. Geol. Soc. Japan, vol.125, no.7, pp.483-516 DOI
• Tamura et al. (2010) Jour. Geol. Soc. Japan, vol.116, Supplement, pp.1-20 DOI
• Sumi and Nozawa (1973) Geology of the Uozu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 104p. (in Japanese with English abstract 5p.)
• Sumi (1967) Geology of the Mikkaichi District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 23p. (in Japanese with English abstract 4p.)
• Sakamoto (1963) Toyama, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 45p. (in Japanese with English abstract 6p.)
• Sakamoto and Nozawa (1960) Yatsuo, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 69p. (in Japanese with English abstract 8p.)
• Nozawa and Sakamoto (1960) Gohyakkoku, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 68p. (in Japanese with English abstract 10p.)