9 results
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2. Stratigraphic evidence for multiple Holocene advances of Lillooet Glacier, southern Coast Mountains, British Columbia.
- Author
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Reyes, Alberto V. and Clague, John J.
- Subjects
GLACIERS ,MOUNTAINS ,MORAINES ,HOLOCENE stratigraphic geology ,ICE - Abstract
Copyright of Canadian Journal of Earth Sciences is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2004
- Full Text
- View/download PDF
3. Large Holocene landslides from Pylon Peak, southwestern British Columbia.
- Author
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Friele, Pierre A. and Clague, John J.
- Subjects
HOLOCENE stratigraphic geology ,LANDSLIDES ,ROCKSLIDES ,DEBRIS avalanches ,VOLCANIC ash, tuff, etc. - Abstract
Copyright of Canadian Journal of Earth Sciences is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2004
- Full Text
- View/download PDF
4. Holocene sediments from a coastal lake on northern Devon Island, Nunavut, Canada.
- Author
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Courtney Mustaphi, Colin J., Gajewski, Konrad, and Lian, Olav
- Subjects
HOLOCENE stratigraphic geology ,MARINE sediments ,ONTOGENY ,FLOODS ,TEMPERATURE effect ,PERMAFROST - Abstract
Copyright of Canadian Journal of Earth Sciences is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2013
- Full Text
- View/download PDF
5. Spatial and temporal variability of sediment delivery from alpine lake basins, Cathedral Provincial Park, southern British Columbia
- Author
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Evans, Martin and Slaymaker, Olav
- Subjects
- *
SEDIMENTS , *HOLOCENE stratigraphic geology , *LAKES - Abstract
This paper presents reconstructions of Holocene sediment yield from four alpine lakes in southern British Columbia. Sediment yield is reconstructed on the basis of suites of dated and correlated cores from each lake. Facies analysis of the complete set of cores suggests that significant changes in sediment delivery have occurred during the Holocene, specifically a shift to a higher energy sedimentary environment in cooler wetter conditions in the late Holocene. Estimated sediment yields range between 2.3 and 11.2 t km-2 a-1. Maximum Holocene variability is a 115% increase at one site. Highest variability is observed at sites just above treeline suggesting that reduced vegetation cover under cooler conditions is a key control on temporal variability of sediment yield at these sites. The temporal variability observed at Holocene timescales is within the range of natural spatial variability observed between the four closely spaced lakes. Overall, the results suggest that the response of small catchments to climate change is highly contingent upon local catchment conditions, and that at all but the most sensitive sites sediment yield changes associated with moderate climate warming are likely to be of a lesser magnitude than the natural spatial variability. [Copyright &y& Elsevier]
- Published
- 2004
- Full Text
- View/download PDF
6. Late Holocene glacial activity at Bromley Glacier, Cambria Icefield, northern British Columbia Coast Mountains, Canada.
- Author
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Hoffman, Kira M., Smith, Dan J., and Fisher, Timothy
- Subjects
HOLOCENE stratigraphic geology ,GLACIOLOGY ,DENDROCHRONOLOGY ,RADIOCARBON dating ,SEDIMENTATION & deposition ,GEOLOGICAL formations ,MOUNTAINS - Abstract
Copyright of Canadian Journal of Earth Sciences is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2013
- Full Text
- View/download PDF
7. Late Holocene glacial activity in Manatee Valley, southern Coast Mountains, British Columbia, Canada.
- Subjects
HOLOCENE stratigraphic geology ,MANATEES ,GLACIERS ,PLANT growth ,LICHENOLOGY ,STATISTICAL correlation - Abstract
Copyright of Canadian Journal of Earth Sciences is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2011
- Full Text
- View/download PDF
8. Holocene and Last Interglacial cloudiness in eastern Baffin Island, Arctic Canada.
- Author
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Fréchette, Bianca, de Vernal, Anne, and Richard, Pierre J. H.
- Subjects
HOLOCENE stratigraphic geology ,BIOTIC communities ,TUNDRAS ,UPPER air temperature ,PLANT diversity ,SEDIMENTS - Abstract
This study presents Last Interglacial and Holocene vegetation and climate changes at Fog Lake (67°11′N, 63°15′W) on eastern Baffin Island, Arctic Canada. The vegetation cover is reported as vegetation structural types (or biomes). July air temperature and sunshine during the growing season (June–July–August–September) were reconstructed from pollen assemblages using the modern analogue technique. The vegetation of the Last Interglacial period evolved from a prostrate dwarf-shrub tundra to a low- and high-shrub tundra vegetation. The succession of four Arctic biomes was distinguished from the Last Interglacial sediments, whereas only one Arctic biome was recorded in the Holocene sediments. From ca. 8300 cal. years BP to present, hemiprostrate dwarf-shrub tundra occupied the soils around Fog Lake. During the Last Interglacial, growing season sunshine was higher than during the Holocene and July air temperature was 4 to 5 °C warmer than present. A principal component analysis helped in assessing relationship between floristic gradients and climate. The major vegetation changes through the Last Interglacial and Holocene were driven by July air temperature variations, whereas the minor, or subtle, vegetation changes seem rather correlated to September sunshine. This study demonstrates that growing season sunshine conditions can be reconstructed from Arctic pollen assemblages, thus providing information on feedbacks associated with cloud cover and summer temperatures, and therefore growing season length. Cette étude présente les changements climatiques et de végétation survenus au cours du dernier interglaciaire et de l’Holocène au lac Fog (67°11′N, 63°15′O), sur la côte est de la Terre de Baffin, dans l’Arctique canadien. La couverture végétale est décrite sous forme de biomes, c.-à-d. de structures de végétation. La température de l’air en juillet et l’ensoleillement lors de la saison de croissance (juin, juillet, août, septembre) ont été reconstitués à partir d’assemblages polliniques selon la méthode des analogues modernes. La végétation de la dernière période interglaciaire a évolué d’une toundra arbustive naine, prostrée à une toundra arbustive basse et haute. Une succession de quatre biomes est visible dans les sédiments du dernier interglaciaire, alors qu’un seul biome est observé dans les sédiments de l’Holocène. Une toundra arbustive hémiprostrée colonize les sols des environs du lac Fog depuis environ 8300 années. Au cours du dernier interglaciaire, l’ensoleillement durant de la saison de croissance était plus élevé que lors de l’Holocène et la température de juillet était de 4 à 5 °C plus chaude qu’actuellement. Une analyse en composantes principales a permis d’évaluer la relation entre les gradients floristiques et le climat. Les changements majeurs de végétation lors du dernier interglaciaire et de l’Holocène découlent principalement des variations de la température de juillet, alors que les changements de végétation plus subtils sont plutôt liés à l’ensoleillement en septembre. Cette étude démontre que les conditions d’ensoleillement lors de la saison de croissance peuvent être déduites à partir des assemblages polliniques des sédiments de l’Arctique, fournissant ainsi de l’information pertinente sur les rétroactions associées au couvert nuageux et aux températures estivales et donc sur la durée de la saison de croissance. [ABSTRACT FROM AUTHOR]
- Published
- 2008
- Full Text
- View/download PDF
9. Cave infill and associated biotic remains as indicators of Holocene environment in Gatineau Park (Quebec, Canada).
- Author
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Lauriol, B., Deschamps, E., Carrier, L., Grimm, W., Morlan, R., and Talon, B.
- Subjects
CAVES ,BIOTIC communities ,HOLOCENE stratigraphic geology - Abstract
Analyzes the cave infill and associated biotic remains as indicators of Holocene environment in Gatineau Park in Quebec, Canada. Information on the study site; Methodology; Details on the paleoenvironmental conditions of the infill; Conclusions.
- Published
- 2003
- Full Text
- View/download PDF
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