Conodonts from the Cape Clay Formation (Lower Ordovician), southern Devon Island, Arctic Archipelago

1981 ◽  
Vol 18 (10) ◽  
pp. 1609-1628 ◽  
Author(s):  
Ed Landing ◽  
Christopher R. Barnes
Keyword(s):  
Northwest Territories ◽  
New Taxa ◽  
Great Basin ◽  
Canadian Arctic ◽  
Dolomitic Limestone ◽  
Devon Island ◽  
The North ◽  
Lower Ordovician ◽  
Conodont Fauna ◽  
Clay Formation

As part of a program involving the Ordovician conodont faunas of southern Devon Island, Northwest Territories, 22 samples were processed from the Cape Clay Formation and lowest Nadlo Point Formation near Dundas Harbour. The Cape Clay Formation is 85 m thick and composed of bluff-forming mottled limestone and dolomitic limestone. A small but diverse conodont fauna of 229 elements was recovered in which 23 form and multielement species are represented. Several new taxa are described in open nomenclature, and multielement Utahconus? bassleri (Furnish) is discussed. The fauna is considered to represent Fauna C of the North American Midcontinent Faunal Province and is indicative of a late Tremadocian age. This fauna, in a unit with few macrofossils, indicates correlation of the Cape Clay Formation near Dundas Harbour with the upper Turner Cliffs Formation of the Foxe Basin, with the upper Copes Bay and (or) lower Baumann Fiord formations of Cornwallis, northwest Devon, and Ellesmere Islands of the Canadian Arctic, and with some portion of Ross–Hintze trilobite Zones A – lower D of the Great Basin.

scholarly journals Lower Ordovician conodonts from Washington Land, western North Greenland

1985 ◽  
Vol 33 ◽  
pp. 261-272
Author(s):  
Svend Stouge ◽  
Gabriella Bagnoli Stouge ◽  
Roberto Albani
Keyword(s):  
Canadian Arctic ◽  
Devon Island ◽  
The North ◽  
Lower Ordovician ◽  
Coastal Cliff ◽  
Faunal Succession ◽  
Conodont Fauna ◽  
The Baltic ◽  
Clay Formation ◽  
North Greenland

Early Canadian (Lower Ordovician) conodonts have been recorded from loose slabs which were collected by J. C. Troelsen in 1941 at Kap Clay, Washington Land, western North Greenland. The samples probably derived from the Cape Clay Formation which is exposed in the steep coastal cliff. The macrofauna of the samples includes Symphysurina sp. of Early Ordovician age. The conodont fauna comprises "Paltodus" bassleri Furnish, Utahconus oneotensis (Furnish}, "Oistodus" triangularis Furnish, and species of Cordylo­dus Pander and "Acontiodus" Pander. The fauna correlates with Fauna C of the North American Mid­continental Faunal succession and with the Cordylodus angulatus Zone of the Baltic-Scania succession. Locally, it correlates with the conodont fauna recorded from the Cape Clay formation of Southern Devon Island, Canadian Arctic Archipelago. The conodont fauna is described applying multielement taxonomy. In all 314 specimens, representing 20 multielement species, were recorded. Some species are new, but they are referred to only in open no­menclature because of the unsettled stratigraphical status of the loose blocks.

LANCASTER SOUND SHIPBORNE MAGNETOMETER SURVEY

1966 ◽  
Vol 3 (2) ◽  
pp. 223-235 ◽  
Author(s):  
D. L. Barrett
Keyword(s):  
Canadian Arctic ◽  
Vertical Movement ◽  
Baffin Island ◽  
Total Field ◽  
Sharp Rise ◽  
Near Surface ◽  
Baffin Bay ◽  
Devon Island ◽  
The North ◽  
Half Graben

The total magnetic field and the depth of water were measured along a ship's track of about 1 000 nautical miles during a shipborne magnetometer survey in Lancaster Sound and Baffin Bay in the eastern part of the Canadian Arctic Archipelago.Several magnetic anomalies on the extreme northern and southern boundaries of Lancaster Sound as well as to the east of Devon Island in Baffin Bay are characteristic of near-surface features. There is little magnetic relief in the center of the sound. The intensity of the total field decreases from south to north and then rises sharply immediately south of Devon Island. This sharp rise trends northeasterly in Baffin Bay.Several features are indicated by these data; (1) a near-surface basement on Devon and Baffin Islands, (2) a basement flexure north of Baffin Island, the whole of Lancaster Sound being downwarped with vertical movement of as much as 8 km in the north, (3) a regional fault extending along the south coast of Devon Island and trending northeast in Baffin Bay.It is concluded that this half-graben structure in. Lancaster Sound may be associated with a postulated median ridge between Greenland and North America.

scholarly journals Upper Ordovician – Upper Silurian conodont biostratigraphy, Devon Island and southern Ellesmere Island, Canadian Arctic Islands, with implications for regional stratigraphy, eustasy, and thermal maturation

2016 ◽  
Vol 53 (9) ◽  
pp. 931-949 ◽  
Author(s):  
Shunxin Zhang ◽  
Khusro Mirza ◽  
Christopher R. Barnes
Keyword(s):  
Canadian Arctic ◽  
Hydrocarbon Exploration ◽  
Upper Ordovician ◽  
Conodont Biostratigraphy ◽  
Thermal Maturation ◽  
Devon Island ◽  
The North ◽  
Cape Phillips Formation ◽  
Upper Silurian ◽  
Local Range

The conodont biostratigraphy for the Upper Ordovician – Upper Silurian carbonate shelf (Irene Bay and Allen Bay formations) and interfingering basinal (Cape Phillips Formation) facies is established for parts of Devon and Ellesmere islands, central Canadian Arctic Islands. Revisions to the interpreted regional stratigraphic relationships and correlations are based on the stratigraphic distribution of the 51 conodont species representing 32 genera, identified from over 5000 well-preserved conodonts recovered from 101 productive samples in nine stratigraphic sections. The six zones recognized are, in ascending order, Amorphognathus ordovicicus Local-Range Zone, Aspelundia fluegeli Interval Zone, Pterospathodus celloni Local-Range Zone, Pt. pennatus procerus Local-Range Zone, Kockelella patula Local-Range Zone, and K. variabilis variabilis – Ozarkodina confluens Concurrent-Range Zone. These provided a more precise dating of the members and formations and, in particular, the range of hiatuses within this stratigraphic succession. The pattern of regional stratigraphy, facies changes, and hiatuses is interpreted as primarily related to the effects of glacioeustasy associated with the terminal Ordovician glaciation and smaller Early Silurian glacial phases, the backstepping of the Silurian shelf margin, and the geodynamic effects of the collision with Laurentia by Baltica to the east and Pearya to the north. Conodont colour alteration index values (CAI 1–6.5) from the nine sections complement earlier graptolite reflectance data in providing regional thermal maturation data of value in hydrocarbon exploration assessments.

Silurian (Wenlockian) trilobites from Baillie-Hamilton Island, Canadian Arctic Archipelago

1977 ◽  
Vol 14 (2) ◽  
pp. 285-317 ◽  
Author(s):  
D. G. Perry ◽  
B. D. E. Chatterton
Keyword(s):  
New Species ◽  
Northwest Territories ◽  
New Taxa ◽  
Canadian Arctic ◽  
Canadian Arctic Archipelago ◽  
Cape Phillips Formation ◽  
Mackenzie Mountains

Wenlockian trilobites representing at least 15 genera are reported from carbonate strata within the Cape Phillips Formation, Baillie-Hamilton Island. The collections are stratigraphically bounded by the graptolite Zones of Cyrtograptus murchisoni and Monograptus testis. The fauna is generically dominated by lichids, odontopleurids, and cheirurids. Scutelluids, phacopids, dalmanitids, and harpids are notable for their absence. At the familial level the fauna corresponds to one recently discovered from similar age beds of the Mackenzie Mountains, Northwest Territories. The limited quantity and fragmental nature of much of the silicified fauna precludes erection of many new taxa, although four new species described are: Sphaerexochus dimorphus, Dicranogmus skinneri, Hemiarges rohri, and Hemiarges mikulici. Dimorphic pygidia are interpreted as probable sexual dimorphs in Sphaerexochus dimorphus n. sp.

scholarly journals Stratigraphy and hystricurid trilobites of the Christian Elv Formation (Lower Ordovician) of western North Greenland

1989 ◽  
Vol 144 ◽  
pp. 5-15
Author(s):  
R.A Fortey ◽  
J.S Peel
Keyword(s):  
New Species ◽  
Shallow Water ◽  
Canadian Arctic ◽  
Ellesmere Island ◽  
The West ◽  
Early Ordovician ◽  
The North ◽  
Lower Ordovician ◽  
A New Species ◽  
North Greenland

The Christian Elv Formation (Early Ordovician) of Daugaard-Jensen Land, western North Greenland, is formally proposed and recognised from southern Hall Land, in the east, to western Ellesmere Island in the Canadian Arctic Islands, to the west. The formation in its type section includes a shallow water trilobite fauna suggesting a mid-Tremadoc age; conodonts indicate the Rossodus manitouensis Zone af the North American Midcontinent Realm. Two species af hystricurid trilobites are present, of which one, Hystricurus scrofulosus, is dcscribed as a new species. The distribution of Hystricurus followed the early Ordovician palaeo-equator and was not confined by palaeocontinental boundaries. Paraplethopeltis is considered to be a subgcnus af Hystricurus.

Systematics of the Lower Ordovician pliomerid trilobite Hintzeia, with species from the Great Basin, western USA

Zootaxa ◽  
2011 ◽  
Vol 2910 (1) ◽  
Author(s):  
NEO E. B. MCADAMS ◽  
JONATHAN M. ADRAIN
Keyword(s):  
Phylogenetic Analysis ◽  
South Korea ◽  
Northwest Territories ◽  
Great Basin ◽  
Posterior Margin ◽  
Original Sample ◽  
Ontogenetic Change ◽  
Anterior Border ◽  
Lower Ordovician ◽  
Senior Synonym

The pliomerid trilobite genus Hintzeia Harrington, 1957, includes only species from the early Tulean (upper Tremadocian) of the Great Basin, USA, and from the Northwest Territories, Canada. Previously assigned species reported from Scandinavia, China, South Korea, and Australia do not appear to be closely related to the western Laurentian species and are excluded from the genus. The monophyly of the group needs to be tested in the context of a broader phylogenetic analysis, but Hintzeia is rediagnosed with potential synapomorphies including a long, wide anterior border with a large, semicircular median arcuate anterior curve in the posterior margin. Hintzeia celsaora (Ross, 1951) and H. firmimarginis (Hintze, 1953) are redescribed based on large new collections from Utah and Idaho. Ontogenetic material of H. celsaora includes an articulated silicified M13 meraspid. Hintzeia parafirmimarginis n. sp. is described on the basis of both abundant disarticulated sclerites and a large articulated individual. Large topotype collections indicate that Hintzeia celsaora (Ross, 1951) is a senior synonym of Protopliomerops aemulus Hintze, 1953; previously claimed differences appear to reflect small original sample sizes, ontogenetic change, and differing photographic orientation.

Education in the Canadian Arctic

Polar Record ◽  
1968 ◽  
Vol 14 (90) ◽  
pp. 293-304
Author(s):  
D. K. F. Wattie
Keyword(s):  
Northwest Territories ◽  
Canadian Arctic ◽  
School Age Children ◽  
School Age ◽  
Canadian North ◽  
The North ◽  
Arctic Coast ◽  
Government Workers ◽  
Camp Life

Children in the Canadian north—the children of hunters and trappers, of miners and prospectors, of bush-pilots and government workers—all attend school together. This year over 8500 pupils are enrolled in the sixty-seven schools of the Northwest Territories and Arctic Quebec comprising some 3600 Eskimo pupils, 1500 Indian pupils and 3400 white and Metis. It is estimated that about 13 per cent of school-age children in the north still do not attend school; these are children whose families live outside the settlements, mainly in the Upper Mackenzie, Nahanni and Central Arctic coast areas. Camp life, however, is swiftly disappearing and a much higher percentage of school-age enrolment is expected within the next few years.

Marionina charae, a new species of enchytraeid (Oligochaeta) from the Canadian arctic

1970 ◽  
Vol 48 (6) ◽  
pp. 1359-1361 ◽  
Author(s):  
Michael J. Tynen
Keyword(s):  
New Species ◽  
North America ◽  
Northwest Territories ◽  
North American ◽  
Canadian Arctic ◽  
The North ◽  
North American Arctic ◽  
A New Species

Marionina charae n. sp. was collected from a stream flowing out of Char Lake, Comwallis Island, in the Northwest Territories of Canada. Thirteen species of Marionina have now been described from North America, and seven species of enchytraeid have been found in the North American arctic.

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