Kowaragi Fm
Period:
Permian
Age Interval:
Late Permian (Wuchiapingian), (8c)
Province:
South Kitakami Belt-the Hikoroichi-Setamai district
Type Locality and Naming
Synonym:
Lithology and Thickness
Compared to the Lower-Middle Permian successions of the South Kitakami Belt, these younger formations are lithologically monotonous and dominated by mudstone with minor sandstone and rare limestone and conglomerate. The mudstones of these strata typically show strong slaty cleavage, except for those in the Okago district, and so have been used as roofing slate.
[Figure 1: Stratigraphy of the Palaeozoic of the South Kitakatmi Belt, NE Japan (after M. Ehiro et al., 2016)]
Lithology Pattern:
Claystone
Relationships and Distribution
Lower contact
Regionally, the schematic strat column indicates the next older unit as Kanokura Fm
Upper contact
Regionally, the schematic strat column indicates this is the youngest unit
Regional extent
GeoJSON
null
Fossils
Age
Late Permian (Wuchiapingian)
Age Span:
Beginning stage:
Wuchiapingian
Fraction up in beginning stage:
0.0
Beginning date (Ma):
259.55
Ending stage:
Wuchiapingian
Fraction up in the ending stage:
1.0
Ending date (Ma):
254.24
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.