Akashima Fm
Period:
Cretaceous
Age Interval:
Province:
Shimanto Belt
Type Locality and Naming
Synonym:
Lithology and Thickness
Volcanic rocks
Lithology Pattern:
Volcanics
Relationships and Distribution
Lower contact
Regionally, the schematic strat column indicates this is the oldest unit
Upper contact
Regionally, the schematic strat column indicates the next younger unit as Nosoko Fm
Regional extent
GeoJSON
null
Fossils
Age
Recent studies show that the volcanic rocks of the Akashima Fm date back to the Cretaceous, (Kano et al. 2012).
Age Span:
Beginning stage:
Maastrichtian
Fraction up in beginning stage:
0.0
Beginning date (Ma):
72.17
Ending stage:
Maastrichtian
Fraction up in the ending stage:
1.0
Ending date (Ma):
66.04
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.