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Sarugamori Formation
Synonym: Sarugamori facies of Tomari Formation
- Coherent formation
- middle Miocene (Plant fossils)
- Contemporaneous heterotopic facies: Tomari Formation
- Sedimentary facies: Freshwater or Brackish
- Lithofacies: Interbedded sandstone and mudstone, Tuff, Tuffaceous sandstone, Mudstone, Siltstone, Shale
- Lithofacies (Basal): Conglomerate
- Lithofacies (Minor): Lignite
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Horobe, Higashidori city, Shimokita county, Aomori pref.
- Fossils (Daijima-type flora): Alnus sp., Alnus kefersteinii, Betula brongniarti, Equisetum cfr. arcticum, Juglans? sp., Quercus? sp., Salix? sp., Metasequoida japonica?, Metasequoia occidentalis, Sequoia sp.
- Fossils (Silicified woods): Glyptostroboxylon cunninghamioides, Liquidambar formosana
- Tsushima and Takizawa (1977) Geology of the Shiriyazaki District, Quadrangle Series, 1:50,000, Geological Survey of Japan, 32p. (in Japanese with English abstract 4p.)
- Imai (1961) Chikagawa, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 45p. (in Japanese with English abstract 4p.)