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Kuri Formation Imamura et al., 1958
Invalid synonym: Upper Tamatsukuri Formation, Sakura Formation
- Type locality: Kuri town, Oda city, Shimane prefecture
- Coherent formation
- middle Miocene (17.5, 15.5 - 14.1 Ma, K-Ar)
- Correlation: Josoji Formation
- Intruded by: Diorite - Augite dolerite - Augite andesite sills
- Sedimentary facies: Shallow marine
- Sedimentary facies (Rhyolite): Submarine lava dome, Submarine lava flow, Shallow intrusion
- Depth of water: Continental shelf - Bathypelagic
- Lithofacies: Tholeiite
- Lithofacies: Mudstone, Dacite - Rhyolite lava, Tuff, Submarine pyroclastic flow deposit, Hyaloclastite
- Lithofacies (Lower, Minor): Sandstone, Conglomerate
- Sedimentary structures (Lower, Minor): Slump structures
- Paleocurrent: from Southeast to Northwest, from South-southeast to North-northwest
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Kuri town - Ushibaragawa river - Nima town, Oda city, Shimane pref.; Mount Oyama - Mount Bukkyozan, Izumo city, Shimane pref.; Saso - Uchima - Sudani - Wakasu - Hirahara - Tamatsukuri - Yasuda - Mount Homanzan - Yakumosansonhiroba - Higashiiwasaka - Mount Hoshigamiyama, Matsue city, Shimane pref.; Arashima town, Yasugi city, Shimane pref.; Awashima shrine, Yonago city, Tottori pref.
- Fossils: Fish scales, Shellfishes (Portlandia cf. tokunagai), Radiolarians
- Fossils (Foraminifera): Ammodiscus incertus, Ammonia cf. beccarii, Amphicoryna fukushimaensis, Baggina notoensis, Bathysiphon sp., Buccella frigida, Cibicides sp., Cribrostomoides cf. crassimargo, Cyclammina cancellata, Cyclammina pusilla, Discammina compressa, Gaudryina ishikiensis, Gaudryina yabei, Globigerina angustiumbilicata, Globigerina praebulloides, Globigerinita glutinata, Haplophragmoides? sp., Hippocrepinella sp., Lagena spp., Lenticulina nikobarensis, Nodosaria spp., Nonion kidoharaense, Martinottiella communis, Plectina nipponica, Praeorbulina sicana, Recurvoides sp., Reophax sp., Spirosigmoilinella compressa, Trochammina? sp., Uvigerina proboscidea
- Fossils (Calcareous nannofossils): Helicosphaera ampliaperta, Sphenolithus heteromorphus, Cyclicargolithus floridanus
- Deposits: Kuroko Massive Sulfide Depostis
- Kano et al. (2025) Geology of the Yonago District (2nd Ed.), Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 84p. (in Japanese with English abstract 4p.)
- Kano (2018) Jour. Geol. Soc. Japan, vol.124, no.10, pp.781-803 DOI
- Sawada et al. (2013) Jour. Geol. Soc. Japan, vol.119, no.4, pp.267-284 DOI
- Hayashi et al. (2013) Jour. Geol. Soc. Japan, vol.119, no.4, pp.300-311 DOI
- Sato et al. (2011) Jour. Geol. Soc. Japan, vol.117, no.8, pp.439-450 DOI
- Utada (2007) Jour. Geol. Soc. Japan, vol.113, no.8, pp.438-453 DOI
- Kano et al. (1994) Geology of the Matsue District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 126p. (in Japanese with English abstract 5p.)
- 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.)