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Hatsuse Formation (Akamine et al., 1956)

Invalid synonym: Hatsuse Tuff Breccia Formation, Hasse Formation

• Type locality: Hatsuse town, Miura city, Kanagawa prefecture
• Coherent formation
• Pliocene
• Correlation: upper Zushi Formation, Ikego Formation, Kagamigaura Formation
• Interfingered: Misaki Formation

• Sedimentary facies: Shallow marine
• Sedimentary facies: Landward slope of trench deposit
• Sedimentary facies: Continental shelf, Storm-dominated shelf
• Depth of water: 200 m or shallower
• Lithofacies: Pumiceous sandstone, Scoriaceous sandstone
• Lithofacies (Minor): Tuffaceous sandy mudstone, Conglomerate
• Sedimentary structures: Cross-stratification

• Thickness: ca. 50 - 600 m
• Upper limit: Kurotaki Unconformity (Hayashi Formation), Abut unconformity (Miyata Formation)
• Lower limit: Conformity (Misaki Formation)
• Lower limit: Bottom of Sj22 Tephra Bed

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

• Distribution: Hatsuse town - Minamishitaura town - Maguchi - Jogashima - Hikibashi - Kaneda - Matsuwa - Aburatsubo - Mitohama, Miura city, Kanagawa pref.; Sajima - Tenjinjima island, Yokosuka city, Kanagawa pref.
• Tephra: Hk, Ok

• Mori and Ogawa (2019) Jour. Geol. Soc. Japan, vol.125, no.10, pp.737-757 DOI
• Takahashi et al. (2016) Jour. Geol. Soc. Japan, vol.122, no.8, pp.375-395, DOI
• 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.)
• Kodama et al. (1980) Geology of the Misaki District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 38p. (in Japanese with English abstract 3p.)