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Awa Group (Koike, 1957) Nakajima et al., 1981

There are opinions to define as a part of Miura Group.

• Coherent formation
• Miocene - Pliocene
• Correlation: northern Miura Group

• Sedimentary facies: Fore-arc basin deposit
• Lithofacies: Mudstone
• Lithofacies (Minor): Sandstone, Conglomerate

• Upper limit: Kurotaki Unconformity (Kazusa Group)
• Lower limit: Unconformity (Mineoka Group, Hota Group)

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

• Distribution: Boso peninsula, Chiba pref.

• Takahashi et al. (2016) Jour. Geol. Soc. Japan, vol.122, no.8, pp.375-395, DOI
• Nakajima and Watanabe (2005) Geology of the Futtsu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 102p. (in Japanese with English abstract 8p.)
• Eto et al. (1998) Geology of the Yokosuka District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 128p. (in Japanese with English abstract 3p.)
• Nakajima et al. (1981) Geology of the Kamogawa District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 107p. (in Japanese with English abstract 7p.)