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Doroyu Formation
- Coherent formation
- Miocene
- Lithofacies: Andesitic lava, Pyroclastic rocks, Mudstone, Sandstone
- Distribution: Oyasu - Akinomiya, Akita pref.
- Takashima and Koshiya (2008) Jour. Geol. Soc. Japan, vol.114, Supplement, pp.97-109 DOI