Nakadake Serpentinite Fm
Period:
Ordovician
Age Interval:
Middle-Late Ordovician (Dapingian), (8b)
Province:
South Kitakami Belt- Miyamori-Hayachine-Kamaishi district
Type Locality and Naming
Synonym:
Lithology and Thickness
It consists of serpentinized peridotite, pyroxenite and hornblendite with subordinate amount of gabbro.
[Figure 1: Stratigraphy of the Palaeozoic of the South Kitakatmi Belt, NE Japan (after M. Ehiro et al., 2016)]
Lithology Pattern:
Granitic
Relationships and Distribution
Lower contact
Regionally, the schematic strat column indicates the next older unit as Kentosan Unit Fm
Upper contact
Regionally, the schematic strat column indicates the next younger unit as Kagura Unit Fm
Regional extent
GeoJSON
null
Fossils
Age
Middle-Late Ordovician (Dapingian)
Age Span:
Beginning stage:
Dapingian
Fraction up in beginning stage:
0.0
Beginning date (Ma):
471.26
Ending stage:
Dapingian
Fraction up in the ending stage:
1.0
Ending date (Ma):
469.42
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.