Akaiwa Formation
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| Akaiwa Formation | |
|---|---|
| Stratigraphic range: Aptian ~ | |
| Type | Geological formation |
| Unit of | Tetori Group |
| Underlies | Kitadani Formation |
| Overlies | Kuwajima Formation |
| Lithology | |
| Primary | Sandstone, conglomerate |
| Location | |
| Coordinates | Lua error in Module:Coordinates at line 489: attempt to index field 'wikibase' (a nil value). |
| Approximate paleocoordinates | Lua error: callParserFunction: function "#coordinates" was not found. |
| Region | Honshu |
| Country | Japan |
Akaiwa Formation (Japan) | |
The Akaiwa Formation (Japanese: 赤岩層, romanized: Akaiwa-sō) is an Early Cretaceous (Aptian) geologic formation in central Honshu, Japan.[2] Fossils of the turtle Kappachelys and indeterminate ornithischians are known from the formation, as well as fossil ornithopod tracks.[3][4]
Fossil content
[edit | edit source]The following fossils have been reported from the formation:[5]
- Osteichthyes indet. - 'fish scales'
- Reptiles
- Turtles
- Crocodylomorpha indet. - isolated teeth of small crocodiles[6]
- ?Euornithopoda indet.
- Neochoristodera indet. - a nearly complete right premaxilla[7]
- Ornithopoda indet. - isolated teeth of small ornithopods
- ?Theropoda indet.
- Ichnofossils
- Ornithischia indet. - tracks[8]
See also
[edit | edit source]- List of dinosaur-bearing rock formations
- List of stratigraphic units with indeterminate dinosaur fossils
References
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- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ a b Hirayama et al., 2013
- ^ Weishampel et al., 2004, pp.517-607
- ^ Akaiwa Formation in the Paleobiology Database
- ^ Matsukawa & Obata, 1994
- ^ Matsumoto et al., 2014
- ^ Azuma & Tomida, 1995
Bibliography
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