Ichinose Fm
Period:
Permian
Age Interval:
late Middle Permian (Roadian), (15a)
Province:
Kurosegawa Belt- Shikoku
Type Locality and Naming
Kurosegawa Belt-central Shikoku
Synonym:
Lithology and Thickness
It is composed of sandstone, conglomerate and mudstone, with subordinate amount of acidic ruff and limestone lenses
[Figure 1: Stratigraphy of the Paleozoic of the Kurosegawa Belt in the central part of Shikoku, Southwest Japan (after M. Ehiro et al., 2016)]
Lithology Pattern:
Aus conglomerate
Relationships and Distribution
Lower contact
Regionally, the schematic strat column indicates the next older unit as Miyadani Fm
Upper contact
Regionally, the schematic strat column indicates the next younger unit as Zohoin Fm
GeoJSON
null
Fossils
Age
late Middle Permian (Roadian)
Age Span:
Beginning stage:
Roadian
Fraction up in beginning stage:
0.0
Beginning date (Ma):
274.37
Ending stage:
Anisian
Fraction up in the ending stage:
1.0
Ending date (Ma):
241.46
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.