[ Top ] [ Japanese ]
Odokorogawa Formation Shiraishi, 1992
- Type locality: Odokorogawa river, Itoigawa city, Niigata prefecture
- Coherent formation
- Meandering river deposit
- Jurassic
- Correlation: Kitamatadani Formation
- Sedimentary facies: Fluvial
- Sedimentary facies (Middle): Braided river, Fluvial channel, Point bar
- Sedimentary facies (Lower): Meandering river, Flood plain, Crevasse-splay
- Lithofacies (Upper, Main): Mudstone, Sandy mudstone
- Lithofacies (Upper, Minor): Sandstone, Conglomerate, Coal
- Lithofacies (Middle): Conglomerate, Sandstone
- Lithofacies (Lower, Main): Sandstone, Mudstone
- Lithofacies (Lower, Minor): Conglomerate, Felsic tuff, Coal
- Sedimentary structures (Middle): Trough cross-stratification, Parallel stratification
- Sedimentary structures (Lower): Cross stratification, Upward-fining
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Odokorogawa river - Kotakigawa river, Itoigawa city, Niigata pref.; Maezawa creek - Gamaharazawa creek - Tsunzawa creek - Yubarazawa creek - Mount Ichinanbayama, Otari city, Kitaazumi county, Nagano pref.
- Fossils: Plant fragments, Roots
- Fossils (Shellfishes): Astarte sp., Bakevellia ohishiensis, Cardinioides ovatus, Corbicula kurumaensis
- Takeuchi et al. (2017) Jour. Geol. Soc. Japan, vol.123, no.5, pp.335-350 DOI
- Takeuchi et al. (2015) Jour. Geol. Soc. Japan, vol.121, no.7, pp.193-216, DOI
- Nagamori et al. (2010) Geology of the Kotaki District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 130p. (in Japanese with English abstract 4p.)
- Nakano et al. (2002) Geology of the Shiroumadake District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 105p. (in Japanese with English abstract 5p.)