Tamayama Formation

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]

Tamayama Formation Stratigraphic range: Santonian PreꞒ Ꞓ O S D C P T J K Pg N ↓
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

Palaeofauna

• Futabasaurus
• Inoceramus
• Plantae indet.
• Titanosauria indet.

See also

• List of dinosaur-bearing rock formations
  • List of stratigraphic units with few dinosaur genera

Footnotes

1. Weishampel, et al. (2004). "Dinosaur distribution." Pp. 517-607.
2. 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.
3. 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.