scholarly journals British Colombia coast, carte des anomalies de Bouguer, échelle 1:1,00,000

10.4095/8349 ◽  
1979 ◽  
Author(s):  
Keyword(s):  
British Colombia

Le terrane de Slide Mountain (Cordillères canadiennes) : une lithosphère océanique marquée par des points chauds

2003 ◽  
Vol 40 (6) ◽  
pp. 833-852 ◽  
Author(s):  
M Tardy ◽  
H Lapierre ◽  
D Bosch ◽  
A Cadoux ◽  
A Narros ◽  
...  
Keyword(s):  
Volcanic Rocks ◽  
Oceanic Island ◽  
Light Rare Earth ◽  
Isotopic Compositions ◽  
Incompatible Elements ◽  
Depleted Mantle ◽  
Mantle Sources ◽  
British Colombia ◽  
Ultramafic Cumulates ◽  
Back Arc

The Slide Mountain Terrane consists of Devonian to Permian siliceous and detrital sediments in which are interbedded basalts and dolerites. Locally, ultramafic cumulates intrude these sediments. The Slide Mountain Terrane is considered to represent a back-arc basin related to the Quesnellia Paleozoic arc-terrane. However, the Slide Mountain mafic volcanic rocks exposed in central British Colombia do not exhibit features of back-arc basin basalts (BABB) but those of mid-oceanic ridge (MORB) and oceanic island (OIB) basalts. The N-MORB-type volcanic rocks are characterized by light rare-earth element (LREE)-depleted patterns, La/Nb ratios ranging between 1 and 2. Moreover, their Nd and Pb isotopic compositions suggest that they derived from a depleted mantle source. The within-plate basalts differ from those of MORB affinity by LREE-enriched patterns; higher TiO2, Nb, Ta, and Th abundances; lower εNd values; and correlatively higher isotopic Pb ratios. The Nd and Pb isotopic compositions of the ultramafic cumulates are similar to those of MORB-type volcanic rocks. The correlations between εNd and incompatible elements suggest that part of the Slide Mountain volcanic rocks derive from the mixing of two mantle sources: a depleted N-MORB type and an enriched OIB type. This indicates that some volcanic rocks of the Slide Mountain basin likely developed from a ridge-centered or near-ridge hotspot. The activity of this hotspot is probably related to the worldwide important mantle plume activity that occurred at the end of Permian times, notably in Siberia.

scholarly journals Raw milk producers with high levels of hygiene and safety

2020 ◽  
Vol 148 ◽  
Author(s):  
A. C. Berge ◽  
T. Baars
Keyword(s):  
North America ◽  
Milk Production ◽  
Production Systems ◽  
Raw Milk ◽  
Indicator Bacteria ◽  
Management Approach ◽  
Natural Food ◽  
Local Agriculture ◽  
British Colombia ◽  
High Level

Abstract There is world-wide increasing interest in the consumption of unprocessed, natural food commodities including fresh (unpasteurised) milk and milk products. Consumers are actively seeking out raw milk, partly due to health reasons, but also for taste, freshness, closeness to the producer and to support local agriculture. The need for high levels of hygiene and safety in farms producing raw milk for direct consumption has long been recognised and has led to federal and industry-initiated systems for safe raw milk production. Raw milk producers in North America and Europe have demonstrated that raw milk, intended for direct consumption, can be produced safe and hygienic. The aim of this paper is to describe practices that have been developed for safe raw milk production. The German Vorzugsmilch is a federally regulated programme for legal raw milk production that was established already in the 1930s to provide raw milk with high hygienic standards controlled for zoonotic diseases to consumers. The Raw Milk Institute is a non-profit organisation established in California that has developed a voluntary safe raw milk programme in North America. RAWMI has developed a risk analysis and management system for raw milk dairy farmers to assist farmers in making individually tailored solutions for various production systems. In British Colombia, Canada, small herd share farms have employed good manufacturing practices, a risk management approach and performed monthly samples for pathogens and indicator bacteria to demonstrate safety and consistency. The major components of the raw milk systems applied, and the results of regular milk microbial indicator bacteria are presented. For the German system, the results from standard monthly pathogen tests are compared to zoonotic pathogen tests from other milk sources. The overall results indicate that raw milk can be produced with a high level of hygiene and safety in various systems.

scholarly journals Polyphase Glacigenic Deformation of Advance Glaciofluvial Sediments, Near Big Creek, British Colombia

2007 ◽  
Vol 47 (2) ◽  
pp. 211-219 ◽  
Author(s):  
David H. Huntley ◽  
Bruce E. Broster
Keyword(s):  
British Columbia ◽  
Brittle Failure ◽  
Lateral Extension ◽  
Polyphase Deformation ◽  
Deformation Structures ◽  
Vertical Extension ◽  
British Colombia ◽  
Late Wisconsinan ◽  
Cordilleran Ice Sheet ◽  
Sheet Deformation

ABSTRACT Deformation structures were observed in glaciofluvial sediments near Big Creek, central British Columbia. These sediments record a sequence of polyphase deformation resulting from the advance and retreat of the Late Wisconsinan (Fraser Glaciation) Cordilleran Ice Sheet. Deformation is attributed to ductile then brittle failure resulting from: (a) horizontal compression and loading as ice advanced over saturated sediments; followed by (b) lateral extension then (c) compression under frozen conditions during glacier overriding; and finally (d) vertical extension during unloading upon déglaciation. Most deformation (a-c, above) appears to have occurred during the advance phase of the Fraser Glaciation.

Re-examining the Importance of Indigenous Perspectives in the Western Environmental Education for Sustainability: “From Tribal to Mainstream Education”

2014 ◽  
Vol 16 (1) ◽  
pp. 117-127 ◽  
Author(s):  
Doreen Vikashni Chandra
Keyword(s):  
Environmental Education ◽  
Indigenous Knowledge ◽  
Environmental Sustainability ◽  
Informal Education ◽  
Education For Sustainability ◽  
Aboriginal Peoples ◽  
Ecological Knowledge ◽  
Mainstream Education ◽  
Indigenous Perspectives ◽  
British Colombia

Abstract This paper highlights the importance of integrating indigenous perspectives on environmental sustainability into mainstream education as a way of bridging the gap in the understanding of indigenous knowledge systems into Western science explanations of sustainable development (SD) in education, at the same time ensuring traditional ecological knowledge (TEK) continuity for future generations as well as taking a steady stand in the global debates on SD. The first part of the paper will attempt to explore the issue of SD through Western and indigenous perspectives and will emphasise on the model of strong sustainability (in theory). Secondly, the importance of TEK will be examined and justified through case studies on Aboriginal peoples of British Colombia and Roviana people of Solomon Islands in achieving goals of sustainability. Thirdly, challenges for TEK will be investigated and some possibilities of protecting the rapid disappearance of indigenous knowledge will be dealt with. Lastly, a pedagogical approach to sustainability will be provided that postulates the relevance of indigenous pedagogy to formal and informal education, attempting to integrate Tilburyís (1995) characteristics of environmental education for sustainability.

An Analysis of 84,244 Patients from the British Colombia Cytology???Colposcopy Program

2004 ◽  
Vol 59 (6) ◽  
pp. 433-434
Author(s):  
J. L. Benedet ◽  
J. P. Matisic ◽  
M. A. Bertrand
Keyword(s):  
British Colombia

scholarly journals Wildfire smoke in the lower stratosphere identified by in situ CO observations

2020 ◽  
Author(s):  
Joram J. D. Hooghiem ◽  
Maria Elena Popa ◽  
Thomas Röckmann ◽  
Jens-Uwe Grooß ◽  
Ines Tritscher ◽  
...  
Keyword(s):  
Lower Stratosphere ◽  
Atmospheric Composition ◽  
Lagrangian Model ◽  
Trace Gas ◽  
Back Trajectory ◽  
Orthogonal Polarization ◽  
Enhancement Ratio ◽  
Wildfire Smoke ◽  
British Colombia

Abstract. Wildfires emit large quantities of aerosols and trace gases, which occasionally reach the lower stratosphere. In August 2017, several pyro-cumulonimbus events injected a large amount of smoke into the stratosphere, observed by lidar and satellites. Satellite observations are in general the main method of detecting these events since in situ aircraft- or balloon-based measurements of atmospheric composition at higher altitudes are not made frequent enough. This work presents accidental balloon-borne trace gas observations of wildfire smoke in the lower stratosphere, identified by enhanced CO mole fractions at approximately 13.6 km. In addition to CO mole fractions, CO2 mole fractions as well as isotopic composition of CO (δ13C and δ18O) have been measured in air samples collected using an AirCore and a LIghtweight Stratospheric Air sampler (LISA) flown on a weather balloon from Sodankylä (4–7 September 2017, 67.37° N, 26.63° E, 179 m a.s.l.), Finland. The greenhouse gas enhancement ratio (∆CO : ∆CO2) and the isotopic signature based on δ13C(CO) and δ18O(CO) independently identify wildfire emissions as the source of the stratospheric CO enhancement. Back-trajectory analysis, performed with the Chemical Lagrangian Model of the Stratosphere (CLaMS), corrected for vertical displacement, due to heating of the wildfire aerosols, by observations made by the Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP) instrument, trace the smoke’s origin to wildfires in British Colombia with an injection date of 12 August 2017. Knowledge of the age of the smoke allowed for a correction of the enhancement ratio, ∆CO : ∆CO2, for the chemical removal of CO by OH. The stable isotope observations were used to estimate the amount of tropospheric air in the plume at the time of observation to be about 34 ± 14 %. The in situ observations provide information on the trace gas chemistry of smoke plumes that reach the stratosphere, as well as the vertical extent of 1 km of the 2017 smoke plume.

scholarly journals Assessing the Water Pollution of the Brahmaputra River Using Water Quality Indexes

Toxics ◽  
2021 ◽  
Vol 9 (11) ◽  
pp. 297
Author(s):  
Alina Barbulescu ◽  
Lucica Barbes ◽  
Cristian Stefan Dumitriu
Keyword(s):  
Water Pollution ◽  
Water Quality ◽  
Mean Squared Error ◽  
Percentage Error ◽  
Distributed Data ◽  
Brahmaputra River ◽  
Monotonic Trend ◽  
Spatially Distributed ◽  
British Colombia ◽  
Spatially Distributed Data

Water quality is continuously affected by anthropogenic and environmental conditions. A significant issue of the Indian rivers is the massive water pollution, leading to the spreading of different diseases due to its daily use. Therefore, this study investigates three aspects. The first one is testing the hypothesis of the existence of a monotonic trend of the series of eight water parameters of the Brahmaputra River recorded for 17 years at ten hydrological stations. When this hypothesis was rejected, a loess trend was fitted. The second aspect is to assess the water quality using three indicators (WQI)–CCME WQI, British Colombia, and a weighted index. The third aspect is to group the years and the stations in clusters used to determine the regional (spatial) and temporal trend of the WQI series, utilizing a new algorithm. A statistical analysis does not reject the hypothesis of a monotonic trend presence for the spatially distributed data but not for the temporal ones. Hierarchical clustering based on the computed WQIs detected two clusters for the spatially distributed data and two for the temporal-distributed data. The procedure proposed for determining the WQI temporal and regional evolution provided good results in terms of mean absolute error, root mean squared error (RMSE), and mean absolute percentage error (MAPE).

scholarly journals Travel Time as Work Time? Nature and Scope of Canadian Labor Law’s Protections for Mobile Workers

2019 ◽  
Vol 29 (3) ◽  
pp. 349-370 ◽  
Author(s):  
Dalia Gesualdi-Fecteau ◽  
Delphine Nakache ◽  
Laurence Matte Guilmain
Keyword(s):  
Travel Time ◽  
Extended Period ◽  
Working Time ◽  
Labor Rights ◽  
Work Time ◽  
Geographical Mobility ◽  
Employment Standards ◽  
Strong Consensus ◽  
Canadian Provinces ◽  
British Colombia

The spectrum of employment-related geographical mobility ranges from hours-long daily commutes to journeys that take workers away from home for an extended period of time. Although distance and travel conditions vary, there is a strong consensus within existing literature that mobility has physical, psychological, and social repercussions. However, is time spent traveling considered as working time? This question is crucial as it dictates whether or not workers can effectively access different sets of labor rights. The objective of this paper is twofold. First, contributing to a deeper understanding of travel time by offering a more sustained and complex representation of the various employment-related travel schemes. Second, assessing the circumstances under which travel time counts as work time with regard to the employment standards legislation in force in four Canadian provinces: Quebec, Ontario, Alberta, and British Colombia.

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