| Akaiwa Formation | |
|---|---|
| Stratigraphic range: Hauterivian-Barremian ~ | |
| Type | Geological formation |
| Unit of | Tetori Group |
| Underlies | Kitadani Formation |
| Overlies | Kuwajima Formation |
| Lithology | |
| Primary | Sandstone, conglomerate |
| Location | |
| Coordinates | 36°12′N 136°42′E / 36.2°N 136.7°E |
| Approximate paleocoordinates | 46°06′N 138°18′E / 46.1°N 138.3°E |
| Region | Honshu |
| Country |  Japan |
  Akaiwa Formation (Japan) | |
The Akaiwa Formation (Japanese: 赤岩層, romanized: Akaiwa-sō) is an Early Cretaceous (Hauterivian-Barremian) geologic formation in central Honshu, Japan.[1] Indeterminate ornithischian fossils are known from the formation. Fossil ornithopod tracks have been reported from the formation.[2] As well as the turtle Kappachelys[3]
- ^ Akaiwa Formation in the Paleobiology Database
- ^ Weishampel et al., 2004, pp.517-607
- ^ Hirayama et al., 2013