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Ama Formation
- Coherent formation
- Pleistocene (450 - 200 ka)
- Sedimentary facies: Marine
- Lithofacies: Interbedded sand, gravel and mud
- Ama Formation
- [ Upper ]
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- AM1 Member
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- AM2 Member
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- AM3 Member
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- [ Lower ]
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Nohbi plain, Aichi pref.
- Tephra: Ata-Torihama tephra (Ata-Th, 240 ka)
- Makinouchi et al. (2013) Jour. Geol. Soc. Japan, vol.119, no.5, pp.335-349 DOI