West Oshima limestone Fm
Period:
Permian, Carboniferous
Age Interval:
Province:
Hokkaido
Type Locality and Naming
West Oshima Belt
Synonym:
Lithology and Thickness
Late Carboniferous, Permian age have been assigned for limestones based on fossils such as corals, algae, fusulinids and conodonts (e.g. Minato & Rowett 1967; Sakagami et al. 1969; Yoshida & Aoki 1972; Minoura & Kato 1978).
Lithology Pattern:
Reef limestone
Relationships and Distribution
Lower contact
West Oshima Oceanic basalt Fm (conformable)
Upper contact
West Oshima chert Fm (conformable)
Regional extent
West Oshima Belt
GeoJSON
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Fossils
Corals, algae, fusulinids and conodonts.
Age
Late Carboniferous, Permian age have been assigned for limestones based on fossils such as corals, algae, fusulinids and conodonts (e.g. Minato & Rowett 1967; Sakagami et al. 1969; Yoshida & Aoki 1972; Minoura & Kato 1978).
Age Span:
Beginning stage:
Kasimovian
Fraction up in beginning stage:
0
Beginning date (Ma):
307.02
Ending stage:
Artinskian
Fraction up in the ending stage:
0
Ending date (Ma):
290.51
Depositional setting
Depositional pattern:
Additional Information
Compiler:
Hayato Ueda. 2g Hokkaido. in Moreno, T., WALLIS, S., Kojima, T. & Gibbons, W. (Eds) 2016. The Geology of Japan. Geological Society. London. 201-220.