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GEOREF RECORD

The paleoenvironment of Tyrannosaurus rex from southwestern Saskatchewan, Canada

Elisabeth E. McIver
The paleoenvironment of Tyrannosaurus rex from southwestern Saskatchewan, Canada
Canadian Journal of Earth Sciences = Revue Canadienne des Sciences de la Terre (February 2002) 39 (2): 207-221

Abstract

The recovery of identifiable plant remains intimately associated with a skeleton of Tyrannosaurus rex in southwestern Saskatchewan, Canada, provides the basis for interpreting the latest Maastrichtian (65.5-65 Ma) paleoenvironment of the region. Fossil plants from the site are described, and fruits formerly known as Aesculus antiquus Dawson or Ficus ceratops Knowlton are transferred to a new taxon, Spinifructus antiquus (Dawson) comb. nov. Study of the sediments of the Frenchman Formation that host the bones and plants, in combination with analysis of the plants, indicates that the regional climate was mesothermal and without winter frost, but with seasonal drought. The T. rex is believed to have roamed a broad river valley abundantly vegetated by a largely deciduous flora. The deciduous nature of the Saskatchewan paleovegetation, interpreted as a response to low winter light levels at high latitude, contrasts strongly with the contemporaneous vegetation of a few degrees latitude further south and leads to questions about how a dinosaur fauna survived in a region where the bulk of the vegetation entered an extended period of dormancy.


ISSN: 0008-4077
EISSN: 1480-3313
Coden: CJESAP
Serial Title: Canadian Journal of Earth Sciences = Revue Canadienne des Sciences de la Terre
Serial Volume: 39
Serial Issue: 2
Title: The paleoenvironment of Tyrannosaurus rex from southwestern Saskatchewan, Canada
Affiliation: University of Saskatchewan, Department of Geological Sciences, Saskatoon, SK, Canada
Pages: 207-221
Published: 200202
Text Language: English
Summary Language: French
Publisher: National Research Council of Canada, Ottawa, ON, Canada
References: 47
Accession Number: 2002-053303
Categories: Stratigraphy
Document Type: Serial
Bibliographic Level: Analytic
Annotation: Includes appendices
Illustration Description: illus. incl. 2 plates
N49°00'00" - N60°00'00", W110°00'00" - W101°19'60"
Country of Publication: Canada
Secondary Affiliation: GeoRef, Copyright 2018, American Geosciences Institute.
Update Code: 200218
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