Yamadori Fm
Period:
Cretaceous
Age Interval:
Early Cretaceous (Valanginian), (8j)
Province:
South Kitakami Belt-Central Sub-belt
Type Locality and Naming
the Karakuwa-Oshika Sub-belt; Oshika Peninsula
Synonym:
Lithology and Thickness
It consists of andesitie to dacitic pyroclastic rocks in the lower part and basalt and basaltic pyroclastic rocks in the upper part
Lithology Pattern:
Gneiss
Relationships and Distribution
Lower contact
The Yamadori Fm unconformably overlies the Ayukawa Fm. Regionally, the schematic strat column indicates the next older unit as Oshika Gr
Upper contact
Regionally, the schematic strat column indicates this is the youngest unit
Regional extent
GeoJSON
null
Fossils
Age
Early Cretaceous (Valanginian)
Age Span:
Beginning stage:
Valanginian
Fraction up in beginning stage:
0.0
Beginning date (Ma):
137.70
Ending stage:
Albian
Fraction up in the ending stage:
1.0
Ending date (Ma):
100.50
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.