East Oshima accretionary Gr
Period:
Triassic, Jurassic
Age Interval:
Province:
Hokkaido
Type Locality and Naming
Rebun-Kabato Sub-belt and Oshima Belt
Synonym:
Lithology and Thickness
The accretionary complexes consist of terrigenous clastic rocks (mainly sandstone and mudstone) and pelagic chert, with lesser amounts of limestone and basalt. They occur as structurally stacked thrust sheets of chert-clastic sequences or melange facies (Kawamura et al. 1986, 2000).
According to Kavamura et al. (2000), the Oshima Belt can be sub-divided into a western region where Carboniferous-Permian limestone and chert occur, and an eastern region where Palaeozoic outcrop is lacking, and Triassic Limestone characteristically occurs.
According to Kavamura et al. (2000), the Oshima Belt can be sub-divided into a western region where Carboniferous-Permian limestone and chert occur, and an eastern region where Palaeozoic outcrop is lacking, and Triassic Limestone characteristically occurs.
Lithology Pattern:
Relationships and Distribution
Lower contact
Oceanic basalt
Upper contact
Regional extent
Rebun-Kabato Sub-belt and Oshima belt.
GeoJSON
null
Fossils
Age
Age Span:
Beginning stage:
Carnian
Fraction up in beginning stage:
0
Beginning date (Ma):
237.00
Ending stage:
Tithonian
Fraction up in the ending stage:
0.682
Ending date (Ma):
145.05
Depositional setting
Depositional pattern:
Additional Information
Compiler:
Hayato Ueda. 2g Hokkaido. in Moreno, T., WALLIS, S., Kojima, T. & Gibbons, W. (Eds) 2016. The Geology of Japan. Geological Society. London. 201-220.