Late Pleistocene evolution of glacial Lake Purcell: a potential floodwater source to the Channeled Scabland
The Quaternary history of the Channeled Scabland (CS) and its primary floodwater sources during marine isotope stage (MIS) 2 are well documented and understood. However, putative floodwaters from glacial lakes in British Columbia are poorly understood; these lakes may have supplied floodwaters to th...
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2012
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ftsimonfu:oai:summit.sfu.ca:12488 2023-05-15T16:40:48+02:00 Late Pleistocene evolution of glacial Lake Purcell: a potential floodwater source to the Channeled Scabland Peters, Jared Lee 2012-09-18 http://summit.sfu.ca/item/12488 unknown etd7469 http://summit.sfu.ca/item/12488 Thesis 2012 ftsimonfu 2022-04-07T18:38:12Z The Quaternary history of the Channeled Scabland (CS) and its primary floodwater sources during marine isotope stage (MIS) 2 are well documented and understood. However, putative floodwaters from glacial lakes in British Columbia are poorly understood; these lakes may have supplied floodwaters to the CS in late MIS 2 during northward retreat of the Cordilleran Ice Sheet. This study combines geomorphology, sedimentology, stratigraphy, aerial photograph interpretation, ground penetrating radar, and geographic information science to reconstruct the paleogeography and evolution of glacial Lake Purcell in the Purcell Trench. Glacial Lake Purcell was a proglacial, ice-contact lake that was ~90 km long, up to 12 km wide, and ~360 m deep against its dam (Purcell Lobe). It contained >70 km3 of water just prior to drainage. It likely drained catastrophically (~47 km3 of water) down the Kootenay River valley into the Columbia River, though geomorphic evidence is equivocal. Thesis Ice Sheet Summit - SFU Research Repository (Simon Fraser University) Glacial Lake ENVELOPE(-129.463,-129.463,58.259,58.259) |
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Open Polar |
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Summit - SFU Research Repository (Simon Fraser University) |
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ftsimonfu |
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unknown |
description |
The Quaternary history of the Channeled Scabland (CS) and its primary floodwater sources during marine isotope stage (MIS) 2 are well documented and understood. However, putative floodwaters from glacial lakes in British Columbia are poorly understood; these lakes may have supplied floodwaters to the CS in late MIS 2 during northward retreat of the Cordilleran Ice Sheet. This study combines geomorphology, sedimentology, stratigraphy, aerial photograph interpretation, ground penetrating radar, and geographic information science to reconstruct the paleogeography and evolution of glacial Lake Purcell in the Purcell Trench. Glacial Lake Purcell was a proglacial, ice-contact lake that was ~90 km long, up to 12 km wide, and ~360 m deep against its dam (Purcell Lobe). It contained >70 km3 of water just prior to drainage. It likely drained catastrophically (~47 km3 of water) down the Kootenay River valley into the Columbia River, though geomorphic evidence is equivocal. |
format |
Thesis |
author |
Peters, Jared Lee |
spellingShingle |
Peters, Jared Lee Late Pleistocene evolution of glacial Lake Purcell: a potential floodwater source to the Channeled Scabland |
author_facet |
Peters, Jared Lee |
author_sort |
Peters, Jared Lee |
title |
Late Pleistocene evolution of glacial Lake Purcell: a potential floodwater source to the Channeled Scabland |
title_short |
Late Pleistocene evolution of glacial Lake Purcell: a potential floodwater source to the Channeled Scabland |
title_full |
Late Pleistocene evolution of glacial Lake Purcell: a potential floodwater source to the Channeled Scabland |
title_fullStr |
Late Pleistocene evolution of glacial Lake Purcell: a potential floodwater source to the Channeled Scabland |
title_full_unstemmed |
Late Pleistocene evolution of glacial Lake Purcell: a potential floodwater source to the Channeled Scabland |
title_sort |
late pleistocene evolution of glacial lake purcell: a potential floodwater source to the channeled scabland |
publishDate |
2012 |
url |
http://summit.sfu.ca/item/12488 |
long_lat |
ENVELOPE(-129.463,-129.463,58.259,58.259) |
geographic |
Glacial Lake |
geographic_facet |
Glacial Lake |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_relation |
etd7469 http://summit.sfu.ca/item/12488 |
_version_ |
1766031229831872512 |