Salmon River district, British Columbia

1921 ◽  
Author(s):  
S J Schofield ◽  
G Hanson
Keyword(s):  
British Columbia ◽  
Salmon River

Detrital zircon geochronology of Neoproterozoic to Permian miogeoclinal strata in British Columbia and Alberta

1998 ◽  
Vol 35 (12) ◽  
pp. 1380-1401 ◽  
Author(s):  
George E Gehrels ◽  
Gerald M Ross
Keyword(s):  
British Columbia ◽  
Detrital Zircon ◽  
Isotopic Signature ◽  
Detrital Zircons ◽  
Detrital Zircon Geochronology ◽  
Salmon River ◽  
Western Canada Sedimentary Basin ◽  
Cordilleran Margin ◽  
Peace River Arch ◽  
Detrital Zircon Ages

U-Pb ages have been determined on 250 detrital zircon grains from Neoproterozoic through Permian miogeoclinal strata in British Columbia and Alberta. Most of the grains in these strata are >1.75 Ga and are interpreted to have been derived from nearby basement provinces (although most grains were probably cycled though one or more sedimentary units prior to final deposition). Important exceptions are Ordovician sandstones that contain grains derived from the Peace River arch, and upper Paleozoic strata with detrital zircons derived from the Franklinian orogen, Salmon River arch (northwestern U.S.A.), and (or) Grenville orogen. These provenance changes resulted in average detrital zircon ages that become progressively younger with time, and may also be reflected by previously reported shifts in the Nd isotopic signature of miogeoclinal strata. In addition to the grains that have identifiable sources, grains of ~1030, ~1053, 1750-1774, and 2344-2464 Ma are common in our samples, but igneous rocks of these ages have not been recognized in the western Canadian Shield. We speculate that unrecognized plutons of these ages may be present beneath strata of the western Canada sedimentary basin. Collectively, our data provide a record of the ages of detrital zircons that accumulated along the Canadian Cordilleran margin during much of Paleozoic time. Comparisons between this reference and the ages of detrital zircons in strata of potentially displaced outboard terranes may help reconstruct the paleogeography and accretionary history of the Cordilleran orogen.

Geology and ore deposits of Salmon river district, British Columbia

1922 ◽  
Author(s):  
S J Schofield ◽  
G Hanson
Keyword(s):  
British Columbia ◽  
Ore Deposits ◽  
Salmon River

scholarly journals Monitoring Glacier Outburst Floods

1980 ◽  
Vol 11 (5) ◽  
pp. 285-300 ◽  
Author(s):  
G.J. Young
Keyword(s):  
British Columbia ◽  
Geographical Distribution ◽  
Modes Of Occurrence ◽  
Salmon River ◽  
Outburst Floods

A review is given of the phenomenon of glacier outburst floods. Geographical distribution, modes of occurrence of glacier-dammed lakes and modes of lake-emptying are discussed. Techniques of monitoring the filling and emptying of glacier-dammed lakes are evaluated and procedures for forecasting the magnitude and frequency of floods are analyzed. The histories of floods on the Salmon River (British Columbia/Alaska) and the Donjek River (Yukon) are given as examples.

Experimental Analysis of Microhabitat Selection by Juvenile Steelhead (Oncorhynchus mykiss) and Coho Salmon (O. kisutch) in a British Columbia Stream

1993 ◽  
Vol 50 (6) ◽  
pp. 1198-1207 ◽  
Author(s):  
Kurt D. Fausch
Keyword(s):  
British Columbia ◽  
Oncorhynchus Mykiss ◽  
Habitat Complexity ◽  
Field Experiments ◽  
Coho Salmon ◽  
Early Summer ◽  
Microhabitat Selection ◽  
Salmon River ◽  
Identical Construction ◽  
Stream Salmonids

Replicate experiments were conducted in the Salmon River, British Columbia, during early summer 1990 to test the relative importance of velocity refuge, visual isolation, and overhead cover to microhabitat selection by steelhead (Oncorhynchus mykiss) parr and age-0 coho salmon (O. kisutch). Four types of artificial Plexiglas structures, the first three of identical construction, had different portions painted to provide increasing habitat complexity: velocity refuge alone, velocity refuge with visual isolation, all three features combined, and overhead cover alone. Steelhead parr selected structures with overhead cover alone or all three features significantly more often than those without overhead cover. Steelhead also selected structures adjacent to the swiftest velocities available and closest to other natural overhead cover, which accounted for most differences in use of the same structure in different locations. In contrast, few age-0 coho salmon used any structures. Those that did selected the three types of structures with velocity refuge about equally, but significantly more often than those with overhead cover alone, regardless of their location. Field experiments such as this hold promise for elucidating mechanisms of habitat selection by stream salmonids.

The record of jökulhlaups from Summit Lake, northwestern British Columbia

1993 ◽  
Vol 30 (3) ◽  
pp. 499-508 ◽  
Author(s):  
William H. Mathews ◽  
John J. Clague
Keyword(s):  
British Columbia ◽  
Water Level ◽  
River Valley ◽  
Water Level Fluctuations ◽  
Salmon River ◽  
The Road ◽  
The North ◽  
Large Numbers ◽  
Dammed Lake ◽  
Effective Seal

Summit Lake, which is impounded by Salmon Glacier, is the largest self-draining, ice-dammed lake in Canada. Until 1961, it contained few icebergs and was stable, overflowing to the north into me Bowser River valley. The first jökulhlaup occurred in December 1961, after a lengthy period of thinning and retreat of Salmon Glacier, when a subglacial runnel developed in the weakened ice dam, allowing the lake to drain suddenly. This flood and two others in 1965 and 1967 caused major damage to the road system in the Salmon River valley south of the lake. Since 1965, with three exceptions, Summit Lake has drained annually; minor floods along Salmon River in 1966, 1969, and 1973 may record partial drainings of the lake, although other explanations are possible. Jökulhlaups in recent years have been smaller and have occurred earlier in the year than most of the early floods. Rapid water-level fluctuations associated with the annual emptying and refilling of Summit Lake have generated large numbers of icebergs, derived from the Salmon Glacier dam; these icebergs presently choke the surface of the lake. The present jökulhlaup cycle is likely to continue either until the glacier readvances or until it retreats to the point that it no longer forms an effective seal.

scholarly journals The occurrence and sources of Campylobacter spp., Salmonellaenterica and Escherichia coli O157:H7 in the Salmon River, British Columbia, Canada

2009 ◽  
Vol 8 (2) ◽  
pp. 374-386 ◽  
Author(s):  
Cassandra C. Jokinen ◽  
Hans Schreier ◽  
William Mauro ◽  
Eduardo Taboada ◽  
Judith L. Isaac-Renton ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
British Columbia ◽  
Water Samples ◽  
Escherichia Coli O157 ◽  
Salmon River ◽  
E Coli ◽  
Faecal Samples ◽  
Precipitation Analysis ◽  
Species Markers ◽  
Pcr Techniques

In this study, we wished to assess the prevalence and determine the sources of three zoonotic bacterial pathogens (Salmonella, Campylobacter, and Escherichia coli O157:H7) in the Salmon River watershed in southwestern British Columbia. Surface water, sewage, and animal faecal samples were collected from the watershed. Selective bacterial culture and PCR techniques were used to isolate these three pathogens and indicator bacteria from these samples and characterize them. Campylobacter was the most prevalent pathogen in all samples, followed by Salmonella, and E. coli O157:H7. E. coli O157:H7 and Salmonella isolation rates from water, as well as faecal coliform densities correlated positively with precipitation, while Campylobacter isolation rates correlated negatively with precipitation. Analysis of DNA extracted from water samples for the presence of Bacteroides host-species markers, and comparisons of C. jejuniflaA-RFLP types and Salmonella serovars from faecal and water samples provided evidence that human sewage and specific domestic and wild animal species were sources of these pathogens; however, in most cases the source could not be determined or more than one source was possible. The frequent isolation of these zoonotic pathogens in the Salmon River highlights the risks to human health associated with intentional and unintentional consumption of untreated surface waters.

Model Assessment of Cattle and Climate Impacts on Stream Fecal Coliform Pollution in the Salmon River Watershed, British Columbia, Canada

2010 ◽  
Vol 215 (1-4) ◽  
pp. 155-176 ◽  
Author(s):  
Zhanxue Zhu ◽  
Klaas Broersma ◽  
Asit Mazumder
Keyword(s):  
British Columbia ◽  
Fecal Coliform ◽  
Climate Impacts ◽  
Model Assessment ◽  
River Watershed ◽  
Salmon River

scholarly journals Supplemental Material: Evolution of the Late Cretaceous Nanaimo Basin, British Columbia, Canada: Definitive provenance links to northern latitudes

2021 ◽  
Author(s):  
J.B. Mahoney ◽  
et al.
Keyword(s):  
British Columbia ◽  
Late Cretaceous ◽  
Detrital Zircon ◽  
Isotopic Data ◽  
Salmon River ◽  
Northern Latitudes ◽  
Ar Geochronology

<div>Item A: Summary of Nanaimo Group Detrital Zircon Samples (A1-A2). Item B: Biostratigraphic Age Control on Samples (B1-B10). Item C: Nanaimo Group Detrital Zircon Data (C1-C77). Item D: Nanaimo Group Conglomerate Clast Detrital Zircon Data (D1-D7). Item E: Nanaimo Group Muscovite Ar-Ar Geochronology (E1-E7). Item F: Nanaimo Group Lu-Hf Isotopic Data (F1-F7). Item G: Modern Salmon River Detrital Zircon Data (G1-G3).<br></div>

scholarly journals Supplemental Material: Evolution of the Late Cretaceous Nanaimo Basin, British Columbia, Canada: Definitive provenance links to northern latitudes

2021 ◽  
Author(s):  
J.B. Mahoney ◽  
et al.
Keyword(s):  
British Columbia ◽  
Late Cretaceous ◽  
Detrital Zircon ◽  
Isotopic Data ◽  
Salmon River ◽  
Northern Latitudes ◽  
Ar Geochronology

<div>Item A: Summary of Nanaimo Group Detrital Zircon Samples (A1-A2). Item B: Biostratigraphic Age Control on Samples (B1-B10). Item C: Nanaimo Group Detrital Zircon Data (C1-C77). Item D: Nanaimo Group Conglomerate Clast Detrital Zircon Data (D1-D7). Item E: Nanaimo Group Muscovite Ar-Ar Geochronology (E1-E7). Item F: Nanaimo Group Lu-Hf Isotopic Data (F1-F7). Item G: Modern Salmon River Detrital Zircon Data (G1-G3).<br></div>

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