Shizugawa Gr
Period:
Jurassic
Age Interval:
Middle Jurassic (Aalenian), (8e)
Province:
South Kitakami Belt-Western Sub-belt
Type Locality and Naming
Shizugawa (Shizukawa)-Hashiura Sub-belt; Shizugawa area
Synonym: Shizukawa Gr
Lithology and Thickness
Lowest Middle Jurassic rocks are represented by the Shizugawa Gr which comprises the Niranohama Formation and overlying Hosoura Formation.
Lithology Pattern:
Clayey sandstone
Relationships and Distribution
Lower contact
Regionally, the schematic strat column indicates the next older unit as Hosoura Fm
Upper contact
Regionally, the schematic strat column indicates the next younger unit as Aratozaki Fm
Regional extent
Shizugawa (Shizukawa)-Hashiura Sub-belt; Shizugawa area
GeoJSON
null
Fossils
Age
lowest Middle Jurassic (Aalenian)
Age Span:
Beginning stage:
Aalenian
Fraction up in beginning stage:
0.0
Beginning date (Ma):
174.70
Ending stage:
Aalenian
Fraction up in the ending stage:
1.0
Ending date (Ma):
170.90
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.