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Susugaya Subgroup
- Coherent formation
- Oceanic arc of Paleo-Izu-Bonin arc
- Middle Miocene (13.5 - ? Ma, Calcareous nannofossils)
- Sedimentary facies: Marine
- Metamorphic facies: Prehnite-Pumpellyite
- Lithofacies: Subaqueous volcaniclastics, Subaqueous lavas
- Thickness: 650 - 1,800 m
- Upper limit: Conformity
- Lower limit: Conformity
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Tanzawa mountains, Kanagawa pref.
- Ishikawa et al. (2016) Jour. Geol. Soc. Japan, vol.122, no.7, pp.291-304, DOI