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Edmontosaurus (Hadrosauridae) bonebed from Horseshoe Canyon Formation, Alberta



Ben Creisler
bcreisler@gmail.com

A new online paper:


Phil R. Bell & Nicolas Campione (2014)
Taphonomy of the Danek Bonebed: a monodominant Edmontosaurus
(Hadrosauridae) bonebed from the Horseshoe Canyon Formation, Alberta.
Canadian Journal of Earth Sciences (advance online publication)
doi: 10.1139/cjes-2014-0062
http://www.nrcresearchpress.com/doi/abs/10.1139/cjes-2014-0062?src=recsys#.U_NvEvldXTo

The Danek Bonebed (Horsethief Member, Horseshoe Canyon Formation, Late
Campanian) is dominated by the remains of at least twelve
Edmontosaurus regalis. Skeletal remains of a tyrannosaurid and
ceratopsid are also known. The predominantly disarticulated remains
were interred on a periodically inundated floodplain and, although the
cause of death is unknown, a sudden, catastrophic death explains the
demographic spread, faunal diversity, rare greenstick fractures, and
homogeneous weathering/abrasion categories of the assemblage. The
Danek Bonebed shares a similar taphonomic signature to the Liscomb
Bonebed (Prince Creek Formation, Alaska), but is unique among all
other described hadrosaurid bonebeds in the unusually high proportion
of bite-marked bones (~30%), suggesting scavenging played a major role
in the reworking of the assemblage. The highest frequency of bite
marks is found on small, often unidentifiable (and commonly ignored)
bone fragments, underscoring the role that such fragments can play in
taphonomic interpretation. Finally, the recognition of E. regalis from
central Alberta is an important datum linking contemporaneous
occurrences in southern Alberta with slightly older records of this
species from the Wapiti Formation in northwestern Alberta.