Yamagami Fm
Period:
Jurassic
Age Interval:
Middle Jurassic (Bathonian), (8i)
Province:
South Kitakami Belt-Central Sub-belt
Type Locality and Naming
the Karakuwa-Oshika Sub-belt; Soma District
Synonym:
Lithology and Thickness
It is dominated by clastic rocks
Lithology Pattern:
Aus conglomerate
Relationships and Distribution
Lower contact
Regionally, the schematic strat column indicates the next older unit as Awazu Fm
Upper contact
Regionally, the schematic strat column indicates the next younger unit as Tochikubo Fm
Regional extent
GeoJSON
null
Fossils
Age
Shown as Middle Jurassic-Early Cretaceous, hence placed Base of Bathonian
Age Span:
Beginning stage:
Bathonian
Fraction up in beginning stage:
0.0
Beginning date (Ma):
168.17
Ending stage:
Bathonian
Fraction up in the ending stage:
1.0
Ending date (Ma):
165.29
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.