Arakigawa Fm
Type Locality and Naming
Fukuji—Takayama area (a) is the type locality of this belt (Tsukada et al., 2004).
Synonym:
Lithology and Thickness
Mafic volcanic rocks with felsic tuffaceous rocks and limestone
[Figure 1: Stratigraphic relationship among the rocks of the Hida Gaien Belt (after M. Ehiro et al., 2016)]
[Figure 2: A columnar section of the Muribu and Fukuji successions showing their major lithologies and characteristic layers and blocks (after M. Ehiro et al., 2016)]
Relationships and Distribution
Lower contact
Regionally, the schematic strat column indicates the next older unit as Rosse Fm
Upper contact
It is in fault contact with the Tandodani Fm. Regionally, the schematic strat column indicates the next younger unit as Moribu Fm
Regional extent
Hida Gaien Belt- Fukuji-Takayama area (a)
GeoJSON
Fossils
The Arakigawa Formation yields Upper Visean—Late Kasimovian (or Gzhelian?) fossils
such as corals, goniatites, foraminifers, fusulinoideans, brachiopods and trilobites (Isomi & Nozawa1957; Fujimoto er al. 1962; lgo 1964; Kobayashi & Hamada I987; Tazawa et al., 2000a).
Age
Depositional setting
Additional Information