Tsubonosawa Metamorphic Complex Fm
Period:
Cambrian, Ordovician
Age Interval:
Fortunian-Tremadocian, (8c)
Province:
South Kitakami Belt-the Hikoroichi-Setamai district
Type Locality and Naming
Synonym:
Lithology and Thickness
It comprises contact metamorphic lithologies derived from mudstone and sandstone protoliths
[Figure 1: Stratigraphy of the Palaeozoic of the South Kitakatmi Belt, NE Japan (after M. Ehiro et al., 2016)]
Lithology Pattern:
Basement
Relationships and Distribution
Lower contact
Regionally, the schematic strat column indicates this is the oldest unit
Upper contact
Regionally, the schematic strat column indicates the next younger unit as Hikami Granite Fm
Regional extent
GeoJSON
null
Fossils
Age
Shown as Cambrian-Ordovician, hence placed Base of Fortunian
Age Span:
Beginning stage:
Fortunian
Fraction up in beginning stage:
0.0
Beginning date (Ma):
538.80
Ending stage:
Tremadocian
Fraction up in the ending stage:
1.0
Ending date (Ma):
477.08
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.