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Hiromine Formation (Hyogo prefecture, 1961) Yamamoto et al., 2000
Invalid synonym: Hiromine Group
Invalid synonym (Upper): Sukain Formation
Invalid synonym (Lower): Shosha Formation, Tobori Formation, Kamitobori Formation, Toyotomi Welded Tuff
- Type locality (Upper): Aisaka - Hachiyoji, Kodera, Himeji city, Hyogo prefecture
- Type locality (Lower): Somentaki fall, Tohorigawa river, Himeji city, Hyogo prefecture
- Volcanic rocks
- Late Cretaceous (82.8 Ma, FT)
- Sedimentary facies (Upper): Lacustrine
- Sedimentary facies (Upper): Gravity flow deposit
- Sedimentary facies (Lower): Large scale caldera-fill deposit, Caldera wall collapse deposit
- Lithofacies (Lower, Minor): Debris avalanche deposit
- Lithofacies (Upper): Conglomerate, Sandstone, Mudstone
- Lithofacies (Lower): Rhyolite pyroclastic flow deposit
- Lithofacies (Lower, Minor): Breccia
- Sedimentary structures: Graded bedding, Parallel stratification
- Sedimentary structures (Minor): Reversed graded bedding
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Mount Hirominesan - Aisaka - Hachiyoji - Somentaki fall - Mount Shoshayama - Sukain - Okusukainn - Toyotomi town - Yamada town, Himeji city, Hyogo pref.; Nishikenzaka town, Kasai city, Hyogo pref.
- Yamamoto et al. (2002) Geology of the Yamasaki District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 48p. (in Japanese with English abstract 4p.)
- Yamamoto et al. (2000) Geology of the Tatsuno District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 66p. (in Japanese with English abstract 5p.)
- Ozaki et al. (1995) Geology of the Hojo District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 101p. (in Japanese with English abstract 6p.)
- Igi and Wadatsumi (1980) Geology of the Kamigori District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 74p. (in Japanese with English abstract 4p.)