Late Holocene glacial activity in Manatee Valley, southern Coast Mountains, British Columbia, Canada
The dendroglaciologic and lichenometric research methodologies employed in this study provide a perspective of glaciological conditions from 5 ka to present in a remote headwater area of the British Columbia Coast Mountains. Since Holocene ice fronts of four glaciers at this site periodically extend...
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crcansciencepubl:10.1139/e10-087 2024-04-28T08:14:29+00:00 Late Holocene glacial activity in Manatee Valley, southern Coast Mountains, British Columbia, Canada Koehler, Lindsey Smith, Dan J. Fisher, Timothy 2011 http://dx.doi.org/10.1139/e10-087 http://www.nrcresearchpress.com/doi/full-xml/10.1139/E10-087 http://www.nrcresearchpress.com/doi/pdf/10.1139/E10-087 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 48, issue 3, page 603-618 ISSN 0008-4077 1480-3313 General Earth and Planetary Sciences journal-article 2011 crcansciencepubl https://doi.org/10.1139/e10-087 2024-04-09T06:56:31Z The dendroglaciologic and lichenometric research methodologies employed in this study provide a perspective of glaciological conditions from 5 ka to present in a remote headwater area of the British Columbia Coast Mountains. Since Holocene ice fronts of four glaciers at this site periodically extended below treeline, previous glacier advances overrode and buried forests beneath till deposits. This study suggests that glaciers were expanding into standing forests at 4.76 and 3.78 ka. Following glacier expansion at 3.78 ka, a period of recession ensued when glaciers withdrew upvalley long enough for the development of deep pedogenic surfaces and the growth of trees exceeding 300 years. Investigations at Beluga and Manatee glaciers benchmark a subsequent episode of significant glacial expansion at 2.42 ka referred to as the “Manatee Advance”. This advance has regional correlatives and is distinguished from the Tiedemann Advance at Manatee Glacier by documentation of substantive ice front retreat between the two episodes. Examination of Little Ice Age (LIA) deposits in the study area allowed for presentation and application of a revised Rhizocarpon spp. lichen growth curve. Lichenometric surveys of lateral moraines associated with Beluga, Manatee, and Oluk glaciers provided limited insight into their early LIA behaviour but record advances during the 15th and 16th centuries. Locally, glaciers achieved their maximum LIA size prior to an early to mid 18th century moraine-building event. This reconstruction of Holocene glacial history offers insights consistent with the emerging record of glacier activity described for other southern British Columbia Coast Mountain glaciers. Article in Journal/Newspaper Beluga Beluga* Canadian Science Publishing Canadian Journal of Earth Sciences 48 3 603 618 |
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Open Polar |
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Canadian Science Publishing |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
General Earth and Planetary Sciences |
spellingShingle |
General Earth and Planetary Sciences Koehler, Lindsey Smith, Dan J. Late Holocene glacial activity in Manatee Valley, southern Coast Mountains, British Columbia, Canada |
topic_facet |
General Earth and Planetary Sciences |
description |
The dendroglaciologic and lichenometric research methodologies employed in this study provide a perspective of glaciological conditions from 5 ka to present in a remote headwater area of the British Columbia Coast Mountains. Since Holocene ice fronts of four glaciers at this site periodically extended below treeline, previous glacier advances overrode and buried forests beneath till deposits. This study suggests that glaciers were expanding into standing forests at 4.76 and 3.78 ka. Following glacier expansion at 3.78 ka, a period of recession ensued when glaciers withdrew upvalley long enough for the development of deep pedogenic surfaces and the growth of trees exceeding 300 years. Investigations at Beluga and Manatee glaciers benchmark a subsequent episode of significant glacial expansion at 2.42 ka referred to as the “Manatee Advance”. This advance has regional correlatives and is distinguished from the Tiedemann Advance at Manatee Glacier by documentation of substantive ice front retreat between the two episodes. Examination of Little Ice Age (LIA) deposits in the study area allowed for presentation and application of a revised Rhizocarpon spp. lichen growth curve. Lichenometric surveys of lateral moraines associated with Beluga, Manatee, and Oluk glaciers provided limited insight into their early LIA behaviour but record advances during the 15th and 16th centuries. Locally, glaciers achieved their maximum LIA size prior to an early to mid 18th century moraine-building event. This reconstruction of Holocene glacial history offers insights consistent with the emerging record of glacier activity described for other southern British Columbia Coast Mountain glaciers. |
author2 |
Fisher, Timothy |
format |
Article in Journal/Newspaper |
author |
Koehler, Lindsey Smith, Dan J. |
author_facet |
Koehler, Lindsey Smith, Dan J. |
author_sort |
Koehler, Lindsey |
title |
Late Holocene glacial activity in Manatee Valley, southern Coast Mountains, British Columbia, Canada |
title_short |
Late Holocene glacial activity in Manatee Valley, southern Coast Mountains, British Columbia, Canada |
title_full |
Late Holocene glacial activity in Manatee Valley, southern Coast Mountains, British Columbia, Canada |
title_fullStr |
Late Holocene glacial activity in Manatee Valley, southern Coast Mountains, British Columbia, Canada |
title_full_unstemmed |
Late Holocene glacial activity in Manatee Valley, southern Coast Mountains, British Columbia, Canada |
title_sort |
late holocene glacial activity in manatee valley, southern coast mountains, british columbia, canada |
publisher |
Canadian Science Publishing |
publishDate |
2011 |
url |
http://dx.doi.org/10.1139/e10-087 http://www.nrcresearchpress.com/doi/full-xml/10.1139/E10-087 http://www.nrcresearchpress.com/doi/pdf/10.1139/E10-087 |
genre |
Beluga Beluga* |
genre_facet |
Beluga Beluga* |
op_source |
Canadian Journal of Earth Sciences volume 48, issue 3, page 603-618 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e10-087 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
48 |
container_issue |
3 |
container_start_page |
603 |
op_container_end_page |
618 |
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1797580518350389248 |