[ Top ] [ Japanese ]

Oyodo Formation Shiida, 1953

• Coherent formation
• Pliocene - Pleistocene
• Correlation: lower Denoto Formation

• Sedimentary facies: Lacustrine
• Lithofacies (Upper): Sanstone, Mudstone
• Lithofacies (Upper, Minor): Clay, Lignite
• Lithofacies (Middle): Gravelly sandstone
• Lithofacies (Basal): Conglomerate

• Thickness: ca. 50 m
• Upper limit: Unconformity (Ryumon Formation)
• Lower limit: Unconformity (Izumi Group)

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

• Distribution: Oyodo city, Yoshino county, Nara pref.
• Fossils: Plants

• Makimoto et al. (2004) Geology of the Kokawa District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 89p. (in Japanese with English abstract 4p.)
• Hirayama and Kambe (1959) Koyasan, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 41p. (in Japanese with English abstract 7p.)
• Hirayama and Kishimoto (1957) Yoshinoyama, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 44p. (in Japanese with English abstract 8p.)