Nokkamappu Fm
Period:
Cretaceous
Age Interval:
Province:
Hokkaido
Type Locality and Naming
Nemuro Belt
Synonym:
Lithology and Thickness
The lowermost formation (Campanian Nokkamappu Formation) contains lava and tuff breccia as well as coarse clastic rocks.
Lithology Pattern:
Volcanic_ash
Relationships and Distribution
Lower contact
Unknown
Upper contact
Unknown
Regional extent
Nemuro Belt
GeoJSON
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Fossils
Cretaceous sections occasionally yield megafossils such as ammonoids and inoceramids (e.g. Naruse et al. 2000).
Age
Age Span:
Beginning stage:
Campanian
Fraction up in beginning stage:
0
Beginning date (Ma):
83.65
Ending stage:
Danian
Fraction up in the ending stage:
0
Ending date (Ma):
66.04
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.