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Sabudani Formation Ichikawa et al., 1953

• Type locality: Sabudani, Naka city, Naka county, Tokushima prefecture
• Coherent formation
• Late Triassic, Carnian

• Sedimentary facies: Marine
• Lithofacies (Upper): Sandstone, Sandy mudstone
• Lithofacies (Lower): Sandstone, Conglomerate
• Sedimentary structures: Hummocky cross-stratification

• Thickness: ca. 75 - 440 m
• Distribution (Width): ca. 450 m
• Upper limit: Unconformity (Hirose Formation)
• Lower limit: Unconformity (Hisone Unit)

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

• Distribution: Sabudani - Sakashu - Sakashukitogawa river - Shimoyochi - Higashisemitani - Kominono, Naka city, Naka county, Tokushima pref.
• Fossils (Ammonoids): Paratrachyceras sp., Sirenites senticosus
• Fossils (Upper, Bivalves): Halobia kawadai, Tosapecten suzukii, Lima naumanni
• Fossils (Lower, Bivalves): Oxytoma pulchra, Mytilus nasai, Minetrigonia katayamai, Myophoria okunominetaniensis
• Fossils (Shellfishes): Anodontophora? sp., Halobia kawadai, Halobia obsolete, Halobia (Zittelihalobia) ornatissima, Palaeoneilo fujinohira, Schafhaeutlia? sp., Trigonucula sakawana, Tosapecten suzukii

• Hara et al. (2014) Geology of the Kitagawa District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 72p. (in Japanese with English abstract 4p.)
• Ishida (2007) Jour. Geol. Soc. Japan, vol.113, no.3, pp.83-94 DOI