Akaiwa subgroup Fm
Period:
Cretaceous
Age Interval:
Early Cretaceous (Albian), (19a, 19b (a) (b), 19d, 19e (a), 19f (b), 19g (c)
Province:
Hida Gaien Belt-Shiroumadake area, Hida Gaien Belt- Fukuji-Takayama area, Hida Gaien Belt-Itoshiro area, Hida Gaien Belt-Ise area
Type Locality and Naming
Hida Gaien Belt
Synonym:
Lithology and Thickness
Conglomerates of the Tetori Gr locally contain chert clasts derived from the Mino-Tanba Belt (Kunugiza et al. 2002).
[Figure 1: Stratigraphic relationship among the rocks of the Hida Gaien Belt (after M. Ehiro et al., 2016)]
Lithology Pattern:
Chert
Relationships and Distribution
Lower contact
Regionally, the schematic strat column indicates the next older unit as Itoshiro Subgroup Fm
Upper contact
Regionally, the schematic strat column indicates the next younger unit as Tetori Gr
Regional extent
Hida Gaien Belt (widespread)
GeoJSON
null
Fossils
Age
Early Cretaceous (Albian)
Age Span:
Beginning stage:
Albian
Fraction up in beginning stage:
0.0
Beginning date (Ma):
113.20
Ending stage:
Albian
Fraction up in the ending stage:
1.0
Ending date (Ma):
100.50
Depositional setting
Depositional pattern:
Additional Information
Compiler:
Moreno, T., WALLIS, S., Kojima, T. & Gibbons, W. (Eds) 2016. The Geology of Japan. Geological Society. London. 1-24.