Owada Fm
Period:
Jurassic
Age Interval:
Middle Jurassic (Bajocian), (8g)
Province:
South Kitakami Belt-Western Sub-belt
Type Locality and Naming
Shizugawa (Shizukawa)-Hashiura Sub-belt; Mizunuma area
Synonym:
Lithology and Thickness
It is comprised of bedded mudstone with alternating beds of sandstone and mudstone
Lithology Pattern:
Sandy_claystone
Relationships and Distribution
Lower contact
Regionally, the schematic strat column indicates the next older unit as Kojima Fm
Upper contact
Regionally, the schematic strat column indicates this is the youngest unit
GeoJSON
null
Fossils
Age
Shown as Middle Jurassic-Early Cretaceous, hence placed 50% up in Bajocian
Age Span:
Beginning stage:
Bajocian
Fraction up in beginning stage:
0.5
Beginning date (Ma):
169.54
Ending stage:
Tithonian
Fraction up in the ending stage:
1.0
Ending date (Ma):
143.10
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.