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Middle Formation Miyamura et al., 1981

• Type locality (Kabuto basin): Hebidanigawa river - Kabutogawa river - Jinbudanigawa river, Seki town, Kameyama city, Mie prefecture
• Type locality (Seki region): Onogawa river - Mount Kannonyama - Hagiwaradani valley, Seki town, Kameyama city, Mie prefecture
• Coherent formation
• First Seto Inland Sea
• Sedimentary basin in island arc
• Miocene

• Sedimentary facies: Lacustrine
• Lithofacies:

• Thickness: ca. 1,200 - 1,500 m
• Upper limit: Parallel unconformity (Upper Formation)
• Lower limit: Transitional (Abudani Member)

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

• Distribution: Hebidanigawa river - Kabutogawa river - Jinbudanigawa river - Onogawa river - Mount Kannonyama - Hagiwaradani valley, Seki town, Kameyama city, Mie pref.

• Miyamura et al. (1981) Geology of the Kameyama District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 128p. (in Japanese with English abstract 9p.)