Tamayama Formation
Stratigraphic range:
TypeGeological formation
Unit ofFutaba Group
Sub-unitsKohisagawa Member, Irimaza Member
UnderliesUnconformity with the Eocene Iwaki Formation
OverliesKasamatsu Formation
Thickness~ 150 metres
Lithology
PrimarySandstone
OtherSiltstone
Location
Regionnorthern 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

See also

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.


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