Arisu Fm
Period:
Carboniferous
Age Interval:
Visean, (8c)
Province:
South Kitakami Belt-the Hikoroichi-Setamai district
Type Locality and Naming
Synonym:
Lithology and Thickness
They are dominated by volcanic rocks and are very thick.
[Figure 1: Stratigraphy of the Palaeozoic of the South Kitakatmi Belt, NE Japan (after M. Ehiro et al., 2016)]
Lithology Pattern:
Volcanics
Relationships and Distribution
Lower contact
Regionally, the schematic strat column indicates the next older unit as Shittakasawa Fm
Upper contact
Regionally, the schematic strat column indicates the next younger unit as Odaira Fm
Regional extent
GeoJSON
null
Fossils
Age
Shown as Carboniferous, hence placed Base of Visean
Age Span:
Beginning stage:
Visean
Fraction up in beginning stage:
0.0
Beginning date (Ma):
346.73
Ending stage:
Visean
Fraction up in the ending stage:
0.5
Ending date (Ma):
338.54
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.