scholarly journals Terrain classification and sensitivity, Arctic Red River, Fort Good Hope, Fort McPherson, Martin House, Ontaratue River, Travaillant Lake, District of Mackenzie, Northwest Territories and Yukon Territory

1972 ◽  
Author(s):  
R L Monroe
Keyword(s):  
Northwest Territories ◽  
Yukon Territory ◽  
Red River ◽  
Terrain Classification ◽  
Lake District ◽  
Fort Mcpherson

A Study of Seismic Risk near Pipeline Corridors in Northwestern Canada and Eastern Alaska

1974 ◽  
Vol 11 (1) ◽  
pp. 147-164 ◽  
Author(s):  
A. E. Stevens ◽  
W. G. Milne
Keyword(s):  
Northwest Territories ◽  
Seismic Risk ◽  
Yukon Territory ◽  
Red River ◽  
Contour Maps ◽  
History Of ◽  
Strain Release ◽  
Fort Mcpherson ◽  
Risk Parameters ◽  
Large Earthquakes

Seismic risk in the Yukon Territory and adjacent areas of the western Northwest Territories and eastern Alaska is evaluated from locations and magnitudes of earthquakes in northern Canada and Alaska from 1899 to 1970. Contour maps illustrate strain release and also predicted accelerations on firm soil for return periods of 30, 50, and 100 years. Calculated values of these risk parameters may vary by a factor of two or more from actual values due to the short earthquake history of the region studied, uncertainties in location and magnitude of past large earthquakes, lack of measured ground accelerations in the regions, and the unknown modifying influence of soil and subsoil materials.Seismic risk may be significant for parts of the Mackenzie Valley pipeline corridor in the vicinity of Fort McPherson between mile 700 (east of Arctic Red River, Northwest Territories) and mile 850 (east of Old Crow, Yukon Territory).

The sequence and correlation of Early Ordovician (Arenig) graptolite faunas in the Richardson Trough and Misty Creek Embayment, Yukon Territory and District of Mackenzie, Canada

2006 ◽  
Vol 43 (12) ◽  
pp. 1791-1820 ◽  
Author(s):  
D E Jackson ◽  
A C Lenz
Keyword(s):  
Northwest Territories ◽  
Deep Water ◽  
Yukon Territory ◽  
Early Ordovician ◽  
The Road ◽  
Bedded Chert ◽  
First Occurrence ◽  
Mackenzie Mountains ◽  
First Time

Four graptolite biozones are recorded from the Arenig portion of the Road River Group in the Richardson and Mackenzie mountains in the Yukon and Northwest Territories. In ascending order, these zones are Tetragraptus approximatus, Pendeograptus fruticosus, Didymograptus bifidus, and Parisograptus caduceus australis (new). The Castlemainian stage may be represented by nongraptolitic massive bedded chert. The Arenig–Llanvirn boundary is drawn below the first occurrence of Undulograptus austrodentatus. Fifty-four graptolite taxa are present, and 16 of these species and subspecies are recorded for the first time in this deep-water biotope, namely, Didymograptus? cf. adamantinus, D. asperus, D. dilatans, D. cf. kurcki, D. validus communis, Holmograptus aff. leptograptoides, H. sp. A, Isograptus? sp. nov. A, I. ? dilemma, Keblograptus geminus, Pseudisograptus manubriatus harrisi, Ps. m. koi, Ps. m. janus, Ps. cf. tau, Xiphograptus lofuensis, and Zygograptus cf. abnormis.

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