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Hanayamazawa Formation Tsuchiya et al., 1997

Separated from Onomatsuzawa Formation by Tsuchiya et al. (1997).

• Type locality: Mihata creek - Kote creek, Hanayamazawa, Hanayama, Kurihara city, Miyagi prefecture
• Coherent formation
• Miocene (9.2 Ma, FT)

• Sedimentary facies: Lacustrine
• Lithofacies: Conglomerate, Tuffaceous sandstone, Siltstone
• Lithofacies (Minor): Tuff, Tuff breccia

• Thickness: ca. 600 m
• Lower limit: Unconformity (Hosokura Formation)

• Distribution: Hanayamazawa - Kote creek - Tozawa river - Ichihasama river, Hanayama, Kurihara city, Miyagi pref.
• Fossils: Broad leaf tree

• Tsuchiya et al. (1997) Geology of the Iwagasaki District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 96p. (in Japanese with English abstract 4p.)