Depositional environments during a glaciolacustrine to marine transition in the Richardson and Rae River basin, N.W.T.
This paper describes the principal glaciolacustrine deposits of a sequence of overlapping ice-marginal lakes known as glacial Lake Richardson and its transition to a postglacial sea following the retreat of a lobe of the Laurentide ice sheet from the Richardson and Rae River basin. The glaciolacustr...
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1987
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Online Access: | http://dx.doi.org/10.1139/e87-203 http://www.nrcresearchpress.com/doi/pdf/10.1139/e87-203 |
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crcansciencepubl:10.1139/e87-203 2023-12-17T10:31:47+01:00 Depositional environments during a glaciolacustrine to marine transition in the Richardson and Rae River basin, N.W.T. Kerr, Daniel E. 1987 http://dx.doi.org/10.1139/e87-203 http://www.nrcresearchpress.com/doi/pdf/10.1139/e87-203 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 24, issue 11, page 2130-2140 ISSN 0008-4077 1480-3313 General Earth and Planetary Sciences journal-article 1987 crcansciencepubl https://doi.org/10.1139/e87-203 2023-11-19T13:38:18Z This paper describes the principal glaciolacustrine deposits of a sequence of overlapping ice-marginal lakes known as glacial Lake Richardson and its transition to a postglacial sea following the retreat of a lobe of the Laurentide ice sheet from the Richardson and Rae River basin. The glaciolacustrine to marine transition is characterized by an upward-fining sequence of facies deposited in proglacial lacustrine environments, succeeded by an upward-coarsening trend corresponding to a regressive marine sequence. A composite stratigraphic section includes (a) basal diamicton, (b) stratified subaqueous sand and gravel, (c) glaciolacustrine silty clay rhythmites, (d) massive marine silty clay, and (e) littoral marine sands. The sudden passage from lacustrine to marine environments is reflected in the abrupt change in depositional mechanisms. Turbidity currents prevailed in the proglacial lake as inferred from thick sequences of varve-like couplets, whereas the salinity of marine waters, impeding the sedimentation of fines by density underflows, led to the deposition of massive structureless marine silty clays by flocculation. Article in Journal/Newspaper Ice Sheet Rae River Canadian Science Publishing (via Crossref) Glacial Lake ENVELOPE(-129.463,-129.463,58.259,58.259) Rae River ENVELOPE(-115.528,-115.528,67.920,67.920) Canadian Journal of Earth Sciences 24 11 2130 2140 |
institution |
Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
General Earth and Planetary Sciences |
spellingShingle |
General Earth and Planetary Sciences Kerr, Daniel E. Depositional environments during a glaciolacustrine to marine transition in the Richardson and Rae River basin, N.W.T. |
topic_facet |
General Earth and Planetary Sciences |
description |
This paper describes the principal glaciolacustrine deposits of a sequence of overlapping ice-marginal lakes known as glacial Lake Richardson and its transition to a postglacial sea following the retreat of a lobe of the Laurentide ice sheet from the Richardson and Rae River basin. The glaciolacustrine to marine transition is characterized by an upward-fining sequence of facies deposited in proglacial lacustrine environments, succeeded by an upward-coarsening trend corresponding to a regressive marine sequence. A composite stratigraphic section includes (a) basal diamicton, (b) stratified subaqueous sand and gravel, (c) glaciolacustrine silty clay rhythmites, (d) massive marine silty clay, and (e) littoral marine sands. The sudden passage from lacustrine to marine environments is reflected in the abrupt change in depositional mechanisms. Turbidity currents prevailed in the proglacial lake as inferred from thick sequences of varve-like couplets, whereas the salinity of marine waters, impeding the sedimentation of fines by density underflows, led to the deposition of massive structureless marine silty clays by flocculation. |
format |
Article in Journal/Newspaper |
author |
Kerr, Daniel E. |
author_facet |
Kerr, Daniel E. |
author_sort |
Kerr, Daniel E. |
title |
Depositional environments during a glaciolacustrine to marine transition in the Richardson and Rae River basin, N.W.T. |
title_short |
Depositional environments during a glaciolacustrine to marine transition in the Richardson and Rae River basin, N.W.T. |
title_full |
Depositional environments during a glaciolacustrine to marine transition in the Richardson and Rae River basin, N.W.T. |
title_fullStr |
Depositional environments during a glaciolacustrine to marine transition in the Richardson and Rae River basin, N.W.T. |
title_full_unstemmed |
Depositional environments during a glaciolacustrine to marine transition in the Richardson and Rae River basin, N.W.T. |
title_sort |
depositional environments during a glaciolacustrine to marine transition in the richardson and rae river basin, n.w.t. |
publisher |
Canadian Science Publishing |
publishDate |
1987 |
url |
http://dx.doi.org/10.1139/e87-203 http://www.nrcresearchpress.com/doi/pdf/10.1139/e87-203 |
long_lat |
ENVELOPE(-129.463,-129.463,58.259,58.259) ENVELOPE(-115.528,-115.528,67.920,67.920) |
geographic |
Glacial Lake Rae River |
geographic_facet |
Glacial Lake Rae River |
genre |
Ice Sheet Rae River |
genre_facet |
Ice Sheet Rae River |
op_source |
Canadian Journal of Earth Sciences volume 24, issue 11, page 2130-2140 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e87-203 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
24 |
container_issue |
11 |
container_start_page |
2130 |
op_container_end_page |
2140 |
_version_ |
1785585174558277632 |