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Tazawamoriyama Formation Iizuka, 1930
Invalid synonym: Sawauchizawa Formation (east of Tsugaru fault), Sonnai Formation, Daishaka Formation, Tanosawa Formation, Amadanaigawa Formation
- Type locality: Daishaka pass, Aomori city, Aomori prefecture
- Coherent formation
- early - middle Pleistocene (ca. 0.76 Ma or younger)
- Contemporaneous heterotopic facies: Ikarigaseki Formation
- Sedimentary facies: Marine
- Sedimentary facies: Narrow and shallow strait with a few km width and elongated to north-south
- Lithofacies: Tuffaceous sandstone
- Lithofacies (Minor): Conglomerate, Siltstone
- Sedimentary structures: Trough cross-stratification, Herringbone cross-stratification, Foreset cross-stratification, Wave-formed ripples
- Distribution: Daishaka pass, Aomori city, Aomori pref.; Sawauchi creek, Daishaka, Namioka, Aomori city, Aomori pref.; Sakaiyama, Kamiyama, Goshogawara city, Aomori pref.; Tsurugasaka, Aomori city, Aomori pref.; Yomogida river, Yomogida city, Higashitsugaru county, Aomori pref.; Ushirogata river, Ushirogata, Aomori city, Aomori pref.; Karatake - Totesawa, Araya, Hirakawa city, Aomori pref.
- Fossils: Brachiopods
- Fossils (Upper): Pipe rocks
- Fossils (Upper, Foraminifera): Anomalina flintii, Astrononion hamadaense, Baggina totomiensis, Cassidulina asanoi, Cassidulina cf. margareta, Cassidulina setanaensis, Cassidulina yabei, Cibicides lobatulus, Cibicides pseudoungerianus, Cibicides subpraecinetus, Chrysalidinella demorpha, Cribrononion clavatum, Cruciloculina japonica, Discorbinella bradyi, Elphidium advenum, Elphidium kusiroense, Eponides nipponicus, Eponides haidengeri, Fissulina laevigata, Fissulina marginata, Globocassidulina subglobosa, Guttulina kishinouyi, Guttulina pacifica, Hanzawaia nipponica, Lagena laevis, Lagena sulcata apiculata, Melonis nicobarense, Oolina hexagons, Planulina subdepressa, Pseudononion japonicum, Pyrgo yabei, Quinqueloculina elongata, Quinqueloculina seminulum, Quinqueloculina vulgaris, Textulalia sp., Valvulineria japonica, Globigerina bulloides, Globigerina falconensis, Globigerina imcompta, Globigerina pachyderma, Globigerina quinqueloba, Globigerina woodi, Globigerinoides immatulus
- Fossils (Upper, Shellfishes): Acila nakazimai, Glycymeris nipponica, Glycymeris yessoensis, Polynemamussium cf. alaskense, Chlamys cosibensis, Chlamys heteroglypta, Chlamys daishkaensis, Swiftopecten swiftii, Mizuhopecten yessoensis, Yabepecten tokunagai, Lima goliath, Monia macrochisma, Monia umbonata, Mytilus crassitesta, Astarte alaskensis, Chama cf. aspersa, Clinocardium chikagawaense, Ezocallista brevisiphonata, Tresus keenae, Fabulina sp., Pholadidea penita, Serpulorbis sp., Neptunea arthritica, Neptunea sp., Astarte borealis, Venericarida crebricostata
- Fossils (Shellfishes): Glycymeris cfr. yessoensis, Chlamys sp., Patinopecten cfr. poculum, Mytilus crassitesta, Lima sp., Nemocardium samarangae, Clinocardium cfr. chikagawaense, Clinocardium cfr. pseudofastosum, Serripes laperousii, Ezocallista brevisiphonata, Meretrix sp., Dosinia japonica, Mercenaria stimpsoni, Clementia iizukai, Mactra sulcataria, Mya japonica, Solen sp.
- Nagamori et al. (2013) Geology of the Aomori-Seibu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 67p. (in Japanese with English abstract 4p.)
- Muraoka and Hase (1990) Geology of the Kuroishi District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 124p. (in Japanese with English abstract 8p.)
- Fujii (1981) Geology of the Aburakawa District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 38p. (in Japanese with English abstract 3p.)