Nabekoshiyama Fm
Period:
Permian
Age Interval:
Upper Permian (Wuchiapingian), (8d)
Province:
South Kitakami Belt-Okago region
Type Locality and Naming
Toyoma(Okago); North Kesennuma; South Kesennuma; Utatsu districts
Synonym:
Lithology and Thickness
Mudstone
[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 Kurosawa Fm
Upper contact
Regionally, the schematic strat column indicates the next younger unit as Toyoma Fm
Regional extent
Toyoma(Okago); North Kesennuma; South Kesennuma; Utatsu districts
GeoJSON
null
Fossils
The Senmatsu, Tanoura and Nabekoshiyama formations, as well as unnamed beds in the Ofunato district, contain Changhsingian fusulinoideans, smaller foraminifers and ammonoids (lshii et at., 1975; Tazawa 1975: Murata & Shimoyama 1979; Ehiro 1996; Kobayashi 2002).
Age
Shown as Upper Permian, hence placed Base of 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:
0.25
Ending date (Ma):
258.22
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.