Cenozoic

Cretaceous

Jurassic

Triassic

Permian

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Doi Formation

Doi Fm

Period:

Permian

Age Interval:

late Middle Permian (Roadian), (15b)

Province:
Kurosegawa Belt- Shikoku

Type Locality and Naming

Kurosegawa Belt-western Shikoku

Synonym:

Lithology and Thickness

This Fm is composed of sandstone, conglomerate and mudstone, with subordinate amount of acidic tuff and limestone lenses

Lithology Pattern:

Sandy_claystone

Regionally, the schematic strat column indicates the next older unit as Tsurukoba Fm

Upper contact

Regionally, the schematic strat column indicates the next younger unit as Kozaki Fm

Regional extent

Kurosegawa Belt-western Shikoku. Coeval with Ichinose Fm

GeoJSON

null

Fossils

Shown as late Middle Permian, hence placed Base of Roadian

Age Span:

Beginning stage:

Roadian

Fraction up in beginning stage:

0.0

Beginning date (Ma):

274.37

Ending stage:

Wordian

Fraction up in the ending stage:

1.0

Ending date (Ma):

264.34

Depositional pattern:

Additional Information

Compiler:

Moreno, T., WALLIS, S., Kojima, T. & Gibbons, W. (Eds) 2016. The Geology of Japan. Geological Society. London. 1-24.