| Tamayama Formation | |
|---|---|
| Stratigraphic range: | |
| Type | Geological formation |
| Unit of | Futaba Group |
| Sub-units | Kohisagawa Member, Irimaza Member |
| Underlies | Unconformity with the Eocene Iwaki Formation |
| Overlies | Kasamatsu Formation |
| Thickness | ~ 150 metres |
| Lithology | |
| Primary | Sandstone |
| Other | Siltstone |
| Location | |
| Region | northern Honshu |
| Country |  Japan |
The Tamayama Formation is a Santonian geologic formation in Japan. Dinosaur remains not referrable to the genus level are among the fossils that have been recovered from the formation.[1] The lower and middle part of the formation consists of braided river sandstone, while the upper portion consists of upper shoreface to inner shelf sandstone.[2] Fossil plants are known from the formation, along with a species of Inoceramus[3] and a sauropod dinosaur.
Palaeofauna
- Futabasaurus
- Inoceramus
- Plantae indet.
- Titanosauria indet.
See also
Footnotes
- ↑ Weishampel, et al. (2004). "Dinosaur distribution." Pp. 517-607.
- ↑ Ando, Hisao; Seishi, Masao; Oshima, Mitsuharu; Matsumaru, Tetsuya (1995). "Fluvial-Shallow Marine Depositional Systems of the Futaba Group (Upper Cretaceous). Depositional facies and sequences". Journal of Geography (Chigaku Zasshi). 104 (2): 284–303. doi:10.5026/jgeography.104.284. ISSN 0022-135X.
- ↑ Takahashi, Masamichi; Friis, Else Marie; Crane, Peter R. (March 2007). "Fossil Seeds of Nymphaeales from the Tamayama Formation (Futaba Group), Late Cretaceous (Early Santonian) of Northeastern Honshu, Japan". International Journal of Plant Sciences. 168 (3): 341–350. doi:10.1086/510414. ISSN 1058-5893.
References
- Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd, Berkeley: University of California Press. 861 pp. ISBN 0-520-24209-2.
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