scholarly journals A Biostratigraphic Summary Based Primarily On Conodonts of Upper Ordovician To Middle Devonian Rocks of southwestern Ellesmere Island and northwestern Devon Island, Canadian Arctic Archipelago

1989 ◽  
Author(s):  
T T Uyeno
Keyword(s):  
Middle Devonian ◽  
Canadian Arctic ◽  
Ellesmere Island ◽  
Canadian Arctic Archipelago ◽  
Upper Ordovician ◽  
Devon Island

Reassessment of Ischnacanthus? scheii Spjeldnaes (Acanthodii, Ischnacanthiformes) from the latest Silurian or earliest Devonian of Ellesmere Island, arctic Canada

2013 ◽  
Vol 50 (9) ◽  
pp. 945-954 ◽  
Author(s):  
Carole J. Burrow
Keyword(s):  
Canadian Arctic ◽  
Biological Species ◽  
Ellesmere Island ◽  
Canadian Arctic Archipelago ◽  
Devon Island ◽  
Thin Sectioning ◽  
Bone Fragments ◽  
Cornwallis Island ◽  
North Greenland ◽  
Fin Spines

Articulated specimens of jawed fishes, and assemblages of disarticulated elements that can be assigned to a single biological species, are extremely rare from pre-Devonian deposits. The acanthodian species Ischnacanthus? scheii Spjeldnaes is based on a monospecific assemblage, comprising fin spines, dentigerous jaw bone fragments and scales, from the ?Siluro-Devonian boundary beds of the Devon Island Formation in central west Ellesmere Island, Canadian Arctic Archipelago, Nunavut. A new examination of the type material, in particular by scanning electron microscopy and thin sectioning of scales, shows that the species is a porosiform poracanthodid that is now assigned to Radioporacanthodes scheii comb. nov. Scales of the same species are also recognized from the upper Pridoli of Cornwallis Island and the ?Pridoli or Lochkovian of north Greenland.

The career and disappearance of Hans K.E. Krüger, Arctic geologist, 1886–1930

Polar Record ◽  
1993 ◽  
Vol 29 (171) ◽  
pp. 277-304 ◽  
Author(s):  
William Barr
Keyword(s):  
Continental Shelf ◽  
Canadian Arctic ◽  
Field Work ◽  
Ellesmere Island ◽  
Canadian Arctic Archipelago ◽  
Royal Canadian Mounted Police ◽  
West Greenland

ABSTRACTOn 19 March 1930 the German geologist, Hans K.E. Krüger, accompanied by a Dane, Åge Rose Bjare, and an Inughuk, Akqioq (the latter driving their dog sledge) set off westwards from the Royal Canadian Mounted Police post at Bache Peninsula, Ellesmere Island; two support sledges, driven by Inughuit, escorted them. It appears to have been Krüger's intention to study the geology of the coasts of the outer islands of the Canadian Arctic archipelago and to carry out soundings of the continental shelf and slope. The two support sledges turned back at Depot Point, Eureka Sound. Krüger, Bjare, and Akqioq were never seen again. This article reviews Krüger's background, his preparations for the expedition (which included two summers of field work in West Greenland and a wintering in northwest Greenland), and the extensive searches mounted by the RCMP in 1931 and 1932. Finally, it analyzes the evidence provided by three messages left by Krüger and subsequently recovered, with a view to making an educated guess as to the fate of the expedition.

Whole-Rock Rb/Sr Ages of Metamorphic Rocks from Northern Ellesmere Island, Canadian Arctic Archipelago. I. The Gneiss Terrain between Ayles Fiord and Yelverton Inlet

1975 ◽  
Vol 12 (1) ◽  
pp. 90-94 ◽  
Author(s):  
A. K. Sinha ◽  
Thomas Frisch
Keyword(s):  
Regional Metamorphism ◽  
Canadian Arctic ◽  
Ellesmere Island ◽  
Metamorphic Rocks ◽  
Canadian Arctic Archipelago ◽  
Fold Belt ◽  
Late Precambrian

The first Precambrian ages from the Northern Ellesmere Fold Belt are reported. Six rocks from the largest gneiss terrain in northern Ellesmere Island yield a Late Precambrian age (minimum 742 ± 12 m.y.) of regional metamorphism. Relatively high initial 87Sr/86Sr suggests that the rocks were derived from crustal materials.

Submerged drainage patterns in Barrow Strait, Canadian Arctic

1976 ◽  
Vol 13 (2) ◽  
pp. 305-311 ◽  
Author(s):  
Brian D. Bornhold ◽  
Nancy M. Finlayson ◽  
David Monahan
Keyword(s):  
Canadian Arctic ◽  
Original Model ◽  
Normal Faults ◽  
Canadian Arctic Archipelago ◽  
Drainage Basins ◽  
Fluvial Erosion ◽  
Devon Island ◽  
Drainage Patterns ◽  
Somerset Island ◽  
East West

Recent detailed bathymetric maps of Barrow Strait enabled a reconsideration of the Tertiary fluvial erosion model used to account for the physiography of the Canadian Arctic Archipelago. Five distinct drainage basins were distinguished within Barrow Strait, including both dendritic and rectangular drainage patterns. The latter were controlled by normal faults along the Precambrian–Paleozoic contact in Peel Sound and Barrow Strait.Several changes in the original model are proposed, including the placement of the main east–west drainage divide through Somerset Island and across Barrow Strait and southern Wellington Channel to Devon Island.

Origin of iron-oxide and silicate melt rocks in Paleogene sediments of southern Ellesmere Island, Canadian Arctic Archipelago, Nunavut

2007 ◽  
Vol 44 (7) ◽  
pp. 1005-1013 ◽  
Author(s):  
Karsten Piepjohn ◽  
Solveig Estrada ◽  
Lutz Reinhardt ◽  
Werner von Gosen ◽  
Harald Andruleit
Keyword(s):  
Canadian Arctic ◽  
Ellesmere Island ◽  
Anthropogenic Activity ◽  
Canadian Arctic Archipelago ◽  
X Ray Diffraction ◽  
Coal Seams ◽  
Volcanic Origin ◽  
X Ray ◽  
Early Tertiary ◽  
Unconsolidated Sand

Between Vendom Fiord and Makinson Inlet on southern Ellesmere Island, Canadian Arctic Archipelago, Nunavut, isolated and fault-bounded Early Tertiary basins are exposed. The basin deposits are Paleocene to Eocene in age and overlie unconformably folded Ordovician and Silurian carbonates of the Paleozoic Franklinian Basin that were affected by intense, pre-Paleocene weathering and karstification in places. The Tertiary sediments consist mainly of dark unconsolidated sand and silt and are interbedded with many centimetre- to metre-thick coal seams. In several places, round orange and red "spots" occur within the dark grey Tertiary basin fills and are clustered on top of the dark grey Tertiary occurrences. The "spots" are up to 100 m in diameter and consist of consolidated burnt shards of clay or clinker. In the centre of the reddish "spots," dark, massive, and partly high-magnetic lava- or slag-like rocks are poorly exposed as masses that are a decimetre or less in scale. These rocks were investigated using thin section studies, as well as X-ray diffraction and X-ray flourescence analyses. The melt rocks are composed of glass, cordierite-group minerals, hematite, magnetite, tridymite, mullite, and cristobalite. They represent paralavas resulting from subsurface combustion of the Tertiary coal seams under conditions similar to those in a blast furnace. An origin by anthropogenic activity or a volcanic origin can be ruled out.

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