Okurodani Formation

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The Okurodani Formation is an Early Cretaceous geologic formation in central Honshu, Japan. Part of the Tetori Group, it primarily consists of freshwater continental sediments deposited in a floodplain environment, with occasional volcanic tuffite horizons. It has an uncertain age, probably dating between the Hauterivian and Aptian.[1] An indeterminate iguanodontian dinosaur tooth has been recovered from the formation. Many other fossil vertebrates are known from the KO2 locality[2]

Quick Facts Type, Unit of ...
Okurodani Formation
Stratigraphic range: Hauterivian–Aptian
TypeGeological formation
Unit ofTetori Group
UnderliesAmagodani Formation
OverliesOtaniyama Formation
Lithology
PrimaryMudstone, Siltstone, Sandstone
OtherTuffite
Location
RegionGifu Prefecture
CountryJapan
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Vertebrate Paleobiota

Amphibians

More information Amphibians reported from the Okurodani Formation, Genus ...
Amphibians reported from the Okurodani Formation
Genus Species Location Stratigraphic position Material Notes Images
Anura Indeterminate KO2 Discoglossid grade
Caudata Indeterminate KO2
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Squamates

More information Squamates reported from the Okurodani Formation, Genus ...
Squamates reported from the Okurodani Formation
Genus Species Location Stratigraphic position Material Notes Images
Sakurasaurus[3] S. shokawensis KO2
?Anguimorpha Indeterminate KO2
Scincomorpha Indeterminate KO2 new taxon
Squamata Indeterminate KO2 2 distinct taxa
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Turtles

More information Turtles reported from the Okurodani Formation, Genus ...
Turtles reported from the Okurodani Formation
Genus Species Location Stratigraphic position Material Notes Images
cf. Sinemys Indeterminate KO2
Sinochelys Indeterminate KO2 Sinochelyidae
Adocidae Indeterminate KO2
Trionychidae Indeterminate KO2
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Choristoderes

More information Choristoderes reported from the Okurodani Formation, Genus ...
Choristoderes reported from the Okurodani Formation
Genus Species Location Stratigraphic position Material Notes Images
Monjurosuchus Indeterminate KO2 "Association of right squamosal, jugal, quadratojugal, and quadrate"
Thumb
Monjurosuchus
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Shokawa ikoi
Shokawa S. ikoi KO2 Partial skeleton
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See also

Footnotes

References

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