| 1. |
- Evans, David C., et al.
(författare)
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Vertebrate fossils (Dinosauria) from the Bonnet Plume Formation, Yukon Territory, Canada
- 2012
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Ingår i: Canadian journal of earth sciences (Print). - : NRC Research Press. - 0008-4077 .- 1480-3313. ; 49:2, s. 396-411
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Tidskriftsartikel (refereegranskat)abstract
- Dinosaurs and other terrestrial vertebrates are poorly documented in the Mesozoic of the Canadian polar region. Here, we provide a complete review of the Upper Cretaceous (Maastrichtian) vertebrate fauna of the Bonnet Plume Formation in the northeastern Yukon Territory, Canada, which includes the description of the first newly collected dinosaur bones from this unit in almost half a century. Previously reported fragmentary dinosaur remains collected in the early 1960’s pertain to an indeterminate hadrosaurid. New material includes a poorly preserved forelimb bone and a pedal phalanx. These new remains pertain to at least one species of non-hadrosaurid ornithischian dinosaur, and the humerus is tentatively referred to a small-bodied basal ornithopod. The new vertebrate fossils from the Bonnet Plume Formation provide further evidence of vertebrates from this unit. However, directed field surveys in 2008 and 2009 suggest that vertebrate fossils are not abundant. A review of the known localities of terrestrial Mesozoic vertebrates from the Canadian Arctic indicate that it had a relatively diverse community of terrestrial vertebrates, including dinosaurs, during the Late Cretaceous, but emphasizes our limited knowledge of the Mesozoic Arctic and considerable potential for future exploration and discovery.
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| 2. |
- Vavrek, Matthew J., et al.
(författare)
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A Paleogene flora from the upper Bonnet Plume Formation of northeast Yukon Territory, Canada
- 2012
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Ingår i: Canadian journal of earth sciences (Print). - : NRC Research Press. - 0008-4077 .- 1480-3313. ; 49:3, s. 547-558
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Tidskriftsartikel (refereegranskat)abstract
- Palaeontological exploration of the Bonnet Plume Basin in northwestern Yukon Territory, Canada, has revealed a Late Paleocene to Early Eocene macrofloral assemblage from a channel fill deposit. The flora is typified by cosmopolitan taxa and dominated by deciduous angiosperms, with the notable presence of Zizyphoides, Ettingshausenia, and Corylites. Floras with a similar composition are known from Late Cretaceous through Early Eocene deposits in Alaska and the Canadian Arctic Archipelago, where they have been interpreted as evidence for warm, equable temperatures. This collection represents the most diverse known Paleogene plant macrofossil assemblage from the Yukon Territory and helps to expand our knowledge of ancient high-latitude floras.
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