St. Mary River Formation

St. Mary River Formation
Stratigraphic range: Early Maastrichtian
↓
Type Geological formation
Underlies Willow Creek Formation
Overlies Bearpaw Formation
Lithology
Primary Sandstone, shale[1]
Location
Named for St. Mary River
Named by George Mercer Dawson[2]
Region North America
Country  Canada,  USA

The St. Mary River Formation is a geological formation in Alberta, Canada whose strata date back to the Late Cretaceous. Dinosaur remains are among the fossils that have been recovered from the formation.[3] The St. Mary River Formation has produced only a few dinosaur fossils in its Albertan outcrops.[4] The St. Mary River Formation outcrops in southwest Alberta.[4]

Contents

Dinosaurs

Ornithischians

Ornithischians reported from the St. Mary River Formation
Genus Species Location Stratigraphic position Material Notes Images

Anchiceratops[5]

A. ornatus[6]

Remains later found to be referrable to Anchiceratops, but it's not known what species.[5]

Indeterminate[5]

Edmontonia[7]

E. longiceps[7]

Edmontosaurus[7]

E. regalis[7]

Indeterminate
  • Alberta

Montanoceratops[8]

M. cerorhynchus[8]

Pachyrhinosaurus[5]

P. canadensis[5]
  • Alberta
  • Yukon[5]

Theropods

Color key
Taxon Reclassified taxon Taxon falsely reported as present Dubious taxon or junior synonym Ichnotaxon Ootaxon Morphotaxon
Notes
Uncertain or tentative data are in small text; crossed out data are discredited.
Theropods reported from the St. Mary River Formation
Genus Species Location Stratigraphic position Material Notes Images

Albertosaurus[5]

Indeterminate[5]
  • Alberta
  • Yukon[5]

Saurornithoides

Indeterminate
  • Alberta

Saurornitholestes[9]

Indeterminate[9]

Troodon[10]

Indeterminate[10]
  • Alberta
  • Yukon[5]

See also

Footnotes

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  1. ^ Lexicon of Canadian Geologic Units. "St. Mary River Formation". http://cgkn1.cgkn.net/weblex/weblex_litho_detail_e.pl?00053:014440. Retrieved 2010-01-01. 
  2. ^ Dawson, G.M., 1883. Preliminary report on the geology of the Bow and Belly river region, Northwest Territory, with special reference to the coal deposits. Geological Survey of Canada, Report of Progress for 1880-81-82, Part B.
  3. ^ Weishampel, David B; et al. (2004). "Dinosaur distribution (Late Cretaceous, North America)." In: Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd, Berkeley: University of California Press. Pp. 574-588. ISBN 0-520-24209-2.
  4. ^ a b "Introduction," Ryan and Russel (2001); page 281.
  5. ^ a b c d e f g h i j k l m n o "1.2 Yukon Territory, Canada; 13. St. Mary River Formation," in Weishampel, et al. (2004). Pages 577-578.
  6. ^ Listed as "? A. ornatus" in "1.2 Yukon Territory, Canada; 13. St. Mary River Formation," in Weishampel, et al. (2004). Pages 577-578.
  7. ^ a b c d Listed as "Edmontonia cf. longiceps" in "1.2 Yukon Territory, Canada; 13. St. Mary River Formation," in Weishampel, et al. (2004). Pages 577-578.
  8. ^ a b c "3.11 Montana, United States; 11. St. Mary River Formation," in Weishampel, et al. (2004). Pages 583-584.
  9. ^ a b Listed as "cf. Saurornitholestes sp." in "1.2 Yukon Territory, Canada; 13. St. Mary River Formation," in Weishampel, et al. (2004). Pages 577-578.
  10. ^ a b Listed as "? Troodon sp." in "1.2 Yukon Territory, Canada; 13. St. Mary River Formation," in Weishampel, et al. (2004). Pages 577-578.

References