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Nakaminato Group

Invalid synonym: Nakaminato Formation

• Coherent formation
• Cretaceous

• Sedimentary facies: Marine
• Lithofacies: Turbidite
• Lithofacies (Minor): Submarine debris flow deposit
• Lithofacies: Sandstone, Siltstone, Interbedded sandstone and siltstone
• Lithofacies (Minor): Conglomerate
• Sedimentary structures: Graded bedding, Parallel stratification, Convolute straticifation, Cross stratification, Flute cast, Groove cast, Sole marks, Slump structure

• Thickness: 1,500 m or thicker

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

• Distribution: Ibaraki pref.
• Fossils: Ammonoids, Inoceramus sp.

• Sakamoto et al. (1972) Geology of the Nakaminato District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 94p. (in Japanese with English abstract 5p.)