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Hadrosaur from Arctic Axel Heiberg Island in Canada



From: Ben Creisler
bcreisler@gmail.com

A new paper:

Matthew J Vavrek, Len V. Hills & Philip J. Currie (2014)
A Hadrosaurid (Dinosauria: Ornithischia) from the Late Cretaceous
(Campanian) Kanguk Formation of Axel Heiberg Island, Nunavut, Canada,
and Its Ecological and Geographical Implications.
Arctic 67(1): 1-9
DOI: http://dx.doi.org/10.14430/arctic4362
http://arctic.journalhosting.ucalgary.ca/arctic/index.php/arctic/article/view/4362

A hadrosaurid vertebra was recovered during a palynological survey of
the Upper Cretaceous Kanguk Formation in the eastern Canadian Arctic.
This vertebra represents the farthest north record of any non-avian
dinosaur to date. Although highly abraded, the fossil nonetheless
represents an interesting biogeographic data point. During the
Campanian, when this vertebra was deposited, the eastern Canadian
Arctic was likely isolated both from western North America by the
Western Interior Seaway and from more southern regions of eastern
North America by the Hudson Seaway. This fossil suggests that
large-bodied hadrosaurid dinosaurs may have inhabited a large polar
insular landmass during the Late Cretaceous, where they would have
lived year-round, unable to migrate to more southern regions during
winters. It is possible that the resident herbivorous dinosaurs could
have fed on non-deciduous conifers, as well as other woody twigs and
stems, during the long, dark winter months when most deciduous plant
species had lost their leaves.
==

News story:

http://www.alaskadispatch.com/article/20140330/worlds-farthest-north-dinosaur-bone-find-sheds-light-cretaceous-world