Shimajiri Gr
Period:
Neogene
Age Interval:
late Miocene-early Pleistocene
Province:
Shimanto Belt
Type Locality and Naming
Synonym:
Lithology and Thickness
It consists chiefly of mudstone and sandstone accompanied by tuff and volcanic and volcaniclastic rocks.
Lithology Pattern:
Clayey sandstone
Relationships and Distribution
Lower contact
Regionally, the schematic strat column indicates the next older unit as Yaeyama Gr
Upper contact
The schematic strat column indicates this is the youngest unit.
Regional extent
The on-land distribution of the group is limited to the eastern periphery of the Ryukyu Arc. However, sediments correlative to this group extend to the Okinawa Trough and the eastern margin of the East China Sea Shelf as well as the region around the Ryukyu Islands (Aiba & Sekiya 1979).
GeoJSON
null
Fossils
Age
late Miocene-early Pleistocene (Ujiie & Kaneko 2006; Imai et al. 2013).
Age Span:
Beginning stage:
Messinian
Fraction up in beginning stage:
0.0
Beginning date (Ma):
7.25
Ending stage:
Piacenzian
Fraction up in the ending stage:
1.0
Ending date (Ma):
2.58
Depositional setting
Shallow-marine
Depositional pattern:
Additional Information
Compiler:
Moreno, T., WALLIS, S., Kojima, T. & Gibbons, W. (Eds) 2016. The Geology of Japan. Geological Society. London. 1-24.