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Kume Formation Saito, 1952

Invalid synonym: Kume Sandy Shale Formation

• Coherent formation
• early Pliocene

• Sedimentary facies: Marine
• Lithofacies: Sandy shale
• Lithofacies (Bottom): Conglomerate

• Thickness: 300 m
• Thickness (Bottom): 40 - 50 m
• Upper limit: Conformity? (Hanareyama Formation)
• Lower limit: Unconformity (Hase Formation, Kawarago Formation, Genjigawa Group = Taga Group)

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

• Distribution: Ishinazaka town - Minamikoya town - Shigemiya town - Ohashi, Hitachi city, Ibaraki pref.; Mayumi town - Okada, Hitachiota city, Ibaraki pref.
• Fossils: Echinoids, Balanus sp., Sponges (Makiyama chitanii), Pipe rocks
• Fossils (Shellfishes): Chlorostoma sp., Lucinoma sp., Neptunea sp., Nuculana sp. Patinopecten yessoensis, Portlandia sp., Turcicula sp., Umbonium subsuchiense, Umbonium tenuistriatum, Yoldia sp.
• Fossils (Limestone in basal conglomerate): Bryozoa, Crinoids
• Fossils (Limestone of Ayukawa Formation in basal conglomerate, Ishinazaka fauna, Brachiopods): Isogramma heritschi, Kitakamichonetes multicapillatus, Transennatia gratiosa, Spinomarginifera kueichowensis, Bathymyonia ussurica, Bathymyonia neimongolica, Urushtenoidea chaoi, Linoproductus sp., Permianella typica, Dicystoconcha lapparenti, Schuchertella debaisiensis, Uncinunellina timorensis, Cleiothyridina sp., Martinia sp., Spiriferella sp., Spiriterellina fredericksi, Whitspakia sp., Leptodus nobilis

• Tazawa et al. (2018) Jour. Geol. Soc. Japan, vol.124, no.11, pp.913-918 DOI
• Tazawa et al. (2014) Jour. Geol. Soc. Japan, vol.120, no.11, pp.377-391 DOI
• Ando et al. (2011) Jour. Geol. Soc. Japan, vol.117, Supplement, pp.49-67 DOI
• Sakamoto et al. (1972) Geology of the Nakaminato District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 94p. (in Japanese with English abstract 5p.)