[ Top ] [ Japanese ]
Chikusa Formation Matsui, 1943
- Type locality: Chikusa, Asakegawa, Komono city, Mie county, Mie prefecture
- Coherent formation
- Miocene sediments related to the paleo Setouchi inner sea
- early - middle Miocene (Foraminifera)
- Correlation: Oi Formation, Katada Formation, Kurami Group, Saigo Group
- Sedimentary facies: Marine
- Lithofacies: Sandstone, Mudstone
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Mount Odakayama - Chikusa, Komono city, Mie county, Mie pref.; Mount Kiraramine - Miyazuma town, Yokkaichi city, Mie pref.
- Fossils: Crabs, Echinoids (Brissopsis sp., Linthia sp., Schizaster sp.), Barnacles (Balanus sp.), Ragworms, Crinoids, Corals, Ostracods
- Fossils (Shellfishes): Acila submirabilis, Cultellus izumoensis, Dentalium spp., Doliocassis sp., Eoscaphander corpulenta, Euspira meisensis, Glycymeris sp., Hiania simizui, Macoma spp., Malletia sp., Nipponomarcia nakamurai, Patinopecten egregius, Periploma mitsuganoensis, Portlandia sp., Saccella minensis, Tritia hongoensis, Turritella s-hataii, Vaginella depressa, Venericardia siogamensis, Yoldia sp.
- Fossils (Foraminifera): Globigerina angustiumbilicata, Globigerina falconensis, Globigerina praebulloides praebulloides, Globigerina praebulloides pseudociperoensis, Globigerina woodi woodi, Globigerinoides japonicus, Globigerinoides obliquus, Globigerinoides quadrilobatus immaturus, Globigerinoides quadrilobatus trilobus, Globigerinoides sicanus, Globigerinoides subquadratsu, Globoquadrina dehiscens, Globoquadrina venezuelana, Globorotalia mayeri, Globorotalia scitula praescitula, Globorotalia siakensis, Prosphaeroidinella disjuncta
- Harayama et al. (1989) Geology of the Gozaishoyama District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 145p. (in Japanese with English abstract 6p.)
- 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.)