Studies of Copper Deposits, Yukon Territory and northern British Columbia

1965 ◽  
Author(s):  
E D Kindle
Keyword(s):  
British Columbia ◽  
Yukon Territory ◽  
Copper Deposits

Holocene Prehistory of the Northwestern Subarctic

2016 ◽  
Author(s):  
Ben Potter
Keyword(s):  
British Columbia ◽  
Residential Mobility ◽  
Economic Change ◽  
Yukon Territory ◽  
Current Understanding ◽  
The Holocene ◽  
Cultural Transitions

This chapter synthesizes our current understanding of Holocene prehistory (from 11,500 years ago) of the northwest Subarctic, encompassing Alaska, Yukon Territory, and northern British Columbia. Various cultural chronologies are considered, as are new interpretations based on recently excavated sites. These data indicate conservation of lithic technologies concurrent with economic change throughout the region. Periods of cultural transitions occurred at 6,000 and 1,000 years ago. High residential mobility is inferred for most of the Holocene, with radical shifts in settlement and technology throughout the region at 1,000 years ago, though there are elements of continuity. Current debates on ethnogenesis of Athapaskans and the utility of typological approaches are also discussed.

Trace-Acid Ion Content of Shallow Snow and Ice Cores from Mountain Sites in Western Canada

1988 ◽  
Vol 10 ◽  
pp. 57-62 ◽  
Author(s):  
G. Holdsworth ◽  
H.R. Krouse ◽  
E. Peake
Keyword(s):  
British Columbia ◽  
Time Series ◽  
Forest Fires ◽  
Time Series Data ◽  
Accumulation Rate ◽  
Ice Cores ◽  
Historical Record ◽  
Yukon Territory ◽  
Series Data ◽  
Snow And Ice

An historical record of the deposition of common acids is contained in snow and ice cores taken from suitable sites in the accumulation zone of certain glaciers. Spatial and time-series data sets for trace-mineral acids have been obtained from snow-pit samples and ice cores from a number of mountain sites in Alberta, British Columbia, and the Northwest and Yukon Territories. In Alberta, it is possible to use temperate firn sites above 3460 m, although elution occurs during certain summers as indicated by isotopic and ionic data. This would also apply to sites of a similar latitude (52°±2°N) in British Columbia. In the Yukon Territory (≥60.5°N) reliable time series for the acid anions may be obtained from sites at altitudes above 3000 m. Elution provides a natural control for demonstrating that field sampling and subsequent analytical procedures do not introduce significant contamination. The Yukon data are compared with the net annual accumulation rate and with altitude. Recent data from the 5340 m Mt Logan site do not indicate any significant increase in natural background levels of snow acidity. Lightning, which is responsible for numerous forest fires in all provinces, is a possible natural source of nitric acid. Spring-summer peaks in nitrate concentration usually occur. In addition, forest-fire smoke may be a significant contributor to the mountain snow-pack chemistry in some years and must be considered when interpreting the Mt Logan core data. One Yukon profile seems to contain the signature from the 1986 Augustine volcanic eruption.

Prehospital ultrasound use among Canadian aeromedical service providers – A cross-sectional survey

CJEM ◽  
2019 ◽  
Vol 22 (3) ◽  
pp. 338-341
Author(s):  
Anna Sedlakova ◽  
Paul Olszynski ◽  
Philip Davis ◽  
John Froh
Keyword(s):  
British Columbia ◽  
Prince Edward Island ◽  
Service Providers ◽  
Point Of Care ◽  
Yukon Territory ◽  
Free Fluid ◽  
Point Of Care Ultrasound ◽  
Cross Sectional Survey ◽  
Cross Sectional ◽  
Patient Disposition

ABSTRACTObjectivesEvidence suggests that prehospital point of care ultrasound (POCUS) may change patient management. It serves as an aid in triage, physical examination, diagnosis, and patient disposition. The rate of adoption of POCUS among aeromedical services throughout Canada is unknown. The objective of this study was to describe current POCUS use among Canadian aeromedical services providers.MethodsThis is a cross-sectional observational study. A survey was emailed to directors of government-funded aeromedical services bases in Canada. Data were analyzed using descriptive statistics.ResultsThe response rate was 82.3% (14/17 aeromedical services directors), representing 41 of 46 individual bases. POCUS is used by aeromedical services in British Columbia, Alberta, Saskatchewan, and Manitoba. New Brunswick, Nova Scotia, Prince Edward Island, and Yukon reported they are planning to introduce POCUS within the next year. Ontario and Newfoundland reported they are not using POCUS and are not planning to introduce it. British Columbia is the only province currently using POCUS on fixed-wing aircraft. Most commonly reported frequency of POCUS use on missions was <25%. Most useful applications are assessment for pneumothorax, abdominal free fluid, and cardiac standstill. The most common barrier to POCUS use is cost of training and maintenance of competence.ConclusionsPrehospital POCUS is available in Western Canada with one third of the Canadian population having access to aeromedical services using ultrasound. The Maritimes and the Yukon Territory will further extend POCUS use on fixed-wing aircraft. While there are barriers to POCUS use, those bases that have adopted POCUS consider it valuable.

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