Hitoegane Fm

Hida Gaien Belt- Fukuji-Takayama area (b)

Synonym:

Consists mostly of felsic tuffaceous rocks without any sign of basaltic volcanism except in its lower horizons (Tsukada 1997). The lithological contrast between the Iwatsubodani Fm and Hitogane Fm indicates a rapid change from mane to felsic magmatism in Ordovician times.

[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)]

Fossil records of conodonts, trilobites, plants and radiolarians (Kobayashi & Hamada 1987; Igo 1990; Tazawa & Kaneko 1991; Tsukada & Koikc I997; Kurihnm 2007).