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Formasi Two Medicine adalah sebuah formasi geologi, atau wilayah bebatuan, yang terdeposit antara 83.5 ± 0.7 Ma dan 70.6 ± 3.4 Ma (juta tahun lampau), pada zaman Campanian (Zaman Kapur Akhir), dan terletak di barat laut Montana dan selatan Alberta. Wilayah tersebut meliputi timur Rocky Mountain Overthrust Belt

Formasi Two Medicine
Stratigraphic range: Campanian
~83.5–74.9 jtyl
Two Medicine.jpg
Wilayah Formasi Two Medicine dekat "Egg Mountain" di utara Montana
JenisFormasi geologi
Garis bawahBearpaw Shale
Garis atasVirgelle Sandstone
Ketebalan600 m (2000 ft) (bagian barat)
Litologi
PrimariBatu pasir
Location
Koordinat48°04′27″N 112°17′58″W / 48.07417°N 112.29944°W / 48.07417; -112.29944 (Two Medicine)
Prakiraan paleokoordinat55°18′N 77°48′W / 55.3°N 77.8°W / 55.3; -77.8 (Two Medicine)
Kawasan Montana
 Alberta
Negara Amerika Serikat
 Kanada

ReferensiSunting

Daftar pustakaSunting

  • Dodson, P., C.A. Forster, and S.D. Sampson. 2004. Ceratopsidae in Weishampel, D.B., P. Dodson, and H. Osmolska (eds.) The Dinosauria. 2nd Edition, University of California Press.
  • Rogers, R.R. (1990). "Taphonomy of three dinosaur bone beds in the Upper Cretaceous Two Medicine Formation of northwestern Montana: evidence for drought-related mortality". PALAIOS. 5: 394–413. doi:10.2307/3514834. 
  • Trexler, D., 2001, Two Medicine Formation, Montana: geology and fauna: In: Mesozoic Vertebrate Life, edited by Tanke, D. H., and Carpenter, K., Indiana University Press, pp. 298–309.
  • Varricchio, D.J. (1995). "Taphonomy of Jack's Birthday Site, a diverse dinosaur bonebed from the Upper Cretaceous Two Medicine Formation of Montana". Palaeogeography, Palaeoclimatology, Palaeoecology. 114: 297–323. doi:10.1016/0031-0182(94)00084-l. 
  • Varricchio, D. J. 2001. Late Cretaceous oviraptorosaur (Theropoda) dinosaurs from Montana. pp. 42–57 in D. H. Tanke and K. Carpenter (eds.), Mesozoic Vertebrate Life. Indiana University Press, Indianapolis, Indiana.
  • Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd, Berkeley: University of California Press. 861 pp. ISBN 0-520-24209-2.