| Formasi Two Medicine Jangkauan stratigrafi: Campanian ~83.5–74.9 jtyl | |
|---|---|
 Wilayah Formasi Two Medicine dekat "Egg Mountain" di utara Montana | |
| Jenis | Formasi geologi |
| Garis bawah | Bearpaw Shale |
| Garis atas | Virgelle Sandstone |
| Ketebalan | 600 m (2.000 ft) (bagian barat) |
| Litologi | |
| Utama | Batu pasir |
| Location | |
| Koordinat | 48°04′27″N 112°17′58″W / 48.07417°N 112.29944°W / 48.07417; -112.29944 (Two Medicine) |
| Prakiraan paleokoordinat | 55°18′N 77°48′W / 55.3°N 77.8°W / 55.3; -77.8 (Two Medicine) |
| Kawasan |  Montana Alberta |
| Negara |  Amerika Serikat Kanada |
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
Referensi
Daftar pustaka
- 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. ISBN0-520-24209-2.