[dinosaur] Oldest dinosaur skeletal remains from western Canada (Early Cretaceous, Alberta)

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Ben [email protected]=0D=0A=0D=0A=0D=0AA new paper:=0D=0A=
=0D=0A=0D=0ARamon Nagesan, James Alexander Campbell, Jason D Pardo, Kendra =
Ilana=0D=0ALennie, Matthew J. Vavrek & Jason Anderson (2019)=0D=0AAn Early =
Cretaceous (Berriasian) fossil-bearing locality from the Rocky=0D=0AMountai=
ns of Alberta, yielding the oldest dinosaur skeletal remains from=0D=0Awest=
ern Canada.=0D=0ACanadian Journal of Earth Sciences (advance online publica=
tion)=0D=0Adoi: https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__doi.=
org_10.1139_cjes-2D2019-2D0166&d=3DDwIBaQ&c=3DclK7kQUTWtAVEOVIgvi0NU5BOUHhp=
N0H8p7CSfnc_gI&r=3DRy_mO4IFaUmGof_Yl9MyZgecRCKHn5g4z1CYJgFW9SI&m=3DPxTa8IAX=
v5XGVohNzIsYDxmXFEjQGVTV8Soh-KE0DPs&s=3DGuQan2zLbwG2Pgt5a6s61o66hWtDQm5HDUh=
a_V3_6Yc&e=3D =0D=0Ahttps://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__=
www.nrcresearchpress.com_doi_abs_10.1139_cjes-2D2019-2D0166-23.Xfz-2DzFVKjX=
4&d=3DDwIBaQ&c=3DclK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=3DRy_mO4IFaU=
mGof_Yl9MyZgecRCKHn5g4z1CYJgFW9SI&m=3DPxTa8IAXv5XGVohNzIsYDxmXFEjQGVTV8Soh-=
KE0DPs&s=3D0uNaCchK4E22tvQsIfOAZsj1pt0OVdkyURmEvN6kMTM&e=3D =0D=0A=0D=0A=0D=
=0AWestern North America preserves iconic dinosaur faunas from the Upper=0D=
=0AJurassic and Upper Cretaceous, but this record is interrupted by an=0D=
=0Aapproximately 20 Myr gap with essentially no terrestrial vertebrate foss=
il=0D=0Alocalities. This poorly-sampled interval is nonetheless important b=
ecause=0D=0Ait is thought to include a possible mass extinction, the origin=
 of orogenic=0D=0Acontrols on dinosaur spatial distribution, and the origin=
 of important=0D=0AUpper Cretaceous dinosaur taxa. Therefore, dinosaur-bear=
ing rocks from this=0D=0Ainterval are of particular interest to vertebrate =
palaeontologists. In this=0D=0Astudy, we report on one such locality from H=
ighwood Pass, Alberta. This=0D=0Alocality has yielded a multitaxic assembla=
ge, with the most diagnostic=0D=0Amaterial identified so far including anky=
losaurian osteoderms and a turtle=0D=0Aplastron element. The fossil horizon=
 lies within the upper part of the=0D=0APocaterra Creek Member (PCM) of the=
 Cadomin Formation (Blairmore Group).=0D=0AThe fossils are assigned as Berr=
iasian (earliest Cretaceous) in age, based=0D=0Aon previous palynomorph ana=
lyses of the PCM and underlying and overlying=0D=0Astrata. The fossils lie =
within numerous cross-bedded sandstone beds=0D=0Aseparated by pebble lenses=
. These sediments are indicative of a relatively=0D=0Ahigh-energy depositio=
nal environment, and the distribution of these fossils=0D=0Aover multiple b=
eds indicates that they accumulated over multiple events,=0D=0Apossibly fla=
sh floods. The fossils exhibit a range of surface weathering,=0D=0Ahaving i=
ntact-to-heavily-weathered cortices. The presence of definitive=0D=0Adinosa=
ur material from near the Jurassic-Cretaceous boundary of Alberta=0D=0Aesta=
blishes the oldest record of dinosaur body fossils in western Canada=0D=0Aa=
nd provides a unique opportunity to study the Early Cretaceous dinosaur=0D=
=0Afaunas of western North America.=0D=0A=0D=0A=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=0D=0A=

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<div dir=3D"ltr"><div><br></div>Ben Creisler<div><a href=3D"mailto:bcreisle=
[email protected]">[email protected]</a></div><div><br></div><div><br></div><di=
v>A new paper:<br><div><br></div><div><br></div><div>Ramon Nagesan, James A=
lexander Campbell, Jason D Pardo, Kendra Ilana Lennie, Matthew J. Vavrek &a=
mp; Jason Anderson (2019)<br>An Early Cretaceous (Berriasian) fossil-bearin=
g locality from the Rocky Mountains of Alberta, yielding the oldest dinosau=
r skeletal remains from western Canada.<br>Canadian Journal of Earth Scienc=
es (advance online publication)<br>doi: <a href=3D"https://urldefense.proof=
point.com/v2/url?u=3Dhttps-3A__doi.org_10.1139_cjes-2D2019-2D0166&amp;d=3DD=
wMFaQ&amp;c=3DclK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&amp;r=3DRy_mO4IFa=
UmGof_Yl9MyZgecRCKHn5g4z1CYJgFW9SI&amp;m=3DPxTa8IAXv5XGVohNzIsYDxmXFEjQGVTV=
8Soh-KE0DPs&amp;s=3DGuQan2zLbwG2Pgt5a6s61o66hWtDQm5HDUha_V3_6Yc&amp;e=3D">h=
ttps://doi.org/10.1139/cjes-2019-0166</a><br><a href=3D"https://urldefense.=
proofpoint.com/v2/url?u=3Dhttps-3A__www.nrcresearchpress.com_doi_abs_10.113=
9_cjes-2D2019-2D0166-23.Xfz-2DzFVKjX4&amp;d=3DDwMFaQ&amp;c=3DclK7kQUTWtAVEO=
VIgvi0NU5BOUHhpN0H8p7CSfnc_gI&amp;r=3DRy_mO4IFaUmGof_Yl9MyZgecRCKHn5g4z1CYJ=
gFW9SI&amp;m=3DPxTa8IAXv5XGVohNzIsYDxmXFEjQGVTV8Soh-KE0DPs&amp;s=3D0uNaCchK=
4E22tvQsIfOAZsj1pt0OVdkyURmEvN6kMTM&amp;e=3D">https://www.nrcresearchpress.=
com/doi/abs/10.1139/cjes-2019-0166#.Xfz-zFVKjX4</a><br><br><br>Western Nort=
h America preserves iconic dinosaur faunas from the Upper Jurassic and Uppe=
r Cretaceous, but this record is interrupted by an approximately 20 Myr gap=
 with essentially no terrestrial vertebrate fossil localities. This poorly-=
sampled interval is nonetheless important because it is thought to include =
a possible mass extinction, the origin of orogenic controls on dinosaur spa=
tial distribution, and the origin of important Upper Cretaceous dinosaur ta=
xa. Therefore, dinosaur-bearing rocks from this interval are of particular =
interest to vertebrate palaeontologists. In this study, we report on one su=
ch locality from Highwood Pass, Alberta. This locality has yielded a multit=
axic assemblage, with the most diagnostic material identified so far includ=
ing ankylosaurian osteoderms and a turtle plastron element. The fossil hori=
zon lies within the upper part of the Pocaterra Creek Member (PCM) of the C=
adomin Formation (Blairmore Group). The fossils are assigned as Berriasian =
(earliest Cretaceous) in age, based on previous palynomorph analyses of the=
 PCM and underlying and overlying strata. The fossils lie within numerous c=
ross-bedded sandstone beds separated by pebble lenses. These sediments are =
indicative of a relatively high-energy depositional environment, and the di=
stribution of these fossils over multiple beds indicates that they accumula=
ted over multiple events, possibly flash floods. The fossils exhibit a rang=
e of surface weathering, having intact-to-heavily-weathered cortices. The p=
resence of definitive dinosaur material from near the Jurassic-Cretaceous b=
oundary of Alberta establishes the oldest record of dinosaur body fossils i=
n western Canada and provides a unique opportunity to study the Early Creta=
ceous dinosaur faunas of western North America.</div><div><br>=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D<br></div></div></div>=0A=

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