Sedimentology and history of a Late Wisconsinan glacial lake, Grande Prairie, Alberta, Canada
The Grande Prairie region of northwestern Alberta was partially covered by glacial Lake Peace, which was dammed against the retreating Laurentide ice sheet. Two levels of glacial Lake Peace are identified in the study are by closely spaced groups of strandlines and minor deltas lying at 805 to 840 m...
Published in: | Boreas |
---|---|
Main Author: | |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Wiley
1991
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1111/j.1502-3885.1991.tb00154.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1502-3885.1991.tb00154.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1502-3885.1991.tb00154.x |
id |
crwiley:10.1111/j.1502-3885.1991.tb00154.x |
---|---|
record_format |
openpolar |
spelling |
crwiley:10.1111/j.1502-3885.1991.tb00154.x 2024-06-02T08:08:18+00:00 Sedimentology and history of a Late Wisconsinan glacial lake, Grande Prairie, Alberta, Canada LIVERMAN, DAVID G. E. 1991 http://dx.doi.org/10.1111/j.1502-3885.1991.tb00154.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1502-3885.1991.tb00154.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1502-3885.1991.tb00154.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Boreas volume 20, issue 3, page 241-257 ISSN 0300-9483 1502-3885 journal-article 1991 crwiley https://doi.org/10.1111/j.1502-3885.1991.tb00154.x 2024-05-03T11:01:50Z The Grande Prairie region of northwestern Alberta was partially covered by glacial Lake Peace, which was dammed against the retreating Laurentide ice sheet. Two levels of glacial Lake Peace are identified in the study are by closely spaced groups of strandlines and minor deltas lying at 805 to 840 m a. s. l., and 655 to 710 m a.s.l. Sedimentation associated with the upper of the two lake levels is marked by rhythmites of silt and clay deposited by turbid underflow, interbedded with diamicton deposited by debris flow. Dropstones and dump structures indicate common ice‐rafting. Thick sequences are only found on the axes of major valleys, where sediment gravity flows were concertrated. Thin sequences of ice proximal glaciolacustrine sediments reflect topographic setting and do not indicate a short‐lived lake. Retreat of the ice front resulted in a decrease in ice‐rafted material and diamicton in sediments. The fall in lake level to the second stage resulted in deposition of sequences of vaguely laminated silt and clay close to the modern Beaverlodge River. These sediments were deposited by suspension settling from interflow or overflow of the Beaverlodge River as it entered the lake. Lake sedimentation was dominated by inflow from unglaciated areas, rather than the ice front. Article in Journal/Newspaper Ice Sheet Wiley Online Library Canada Glacial Lake ENVELOPE(-129.463,-129.463,58.259,58.259) Boreas 20 3 241 257 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
The Grande Prairie region of northwestern Alberta was partially covered by glacial Lake Peace, which was dammed against the retreating Laurentide ice sheet. Two levels of glacial Lake Peace are identified in the study are by closely spaced groups of strandlines and minor deltas lying at 805 to 840 m a. s. l., and 655 to 710 m a.s.l. Sedimentation associated with the upper of the two lake levels is marked by rhythmites of silt and clay deposited by turbid underflow, interbedded with diamicton deposited by debris flow. Dropstones and dump structures indicate common ice‐rafting. Thick sequences are only found on the axes of major valleys, where sediment gravity flows were concertrated. Thin sequences of ice proximal glaciolacustrine sediments reflect topographic setting and do not indicate a short‐lived lake. Retreat of the ice front resulted in a decrease in ice‐rafted material and diamicton in sediments. The fall in lake level to the second stage resulted in deposition of sequences of vaguely laminated silt and clay close to the modern Beaverlodge River. These sediments were deposited by suspension settling from interflow or overflow of the Beaverlodge River as it entered the lake. Lake sedimentation was dominated by inflow from unglaciated areas, rather than the ice front. |
format |
Article in Journal/Newspaper |
author |
LIVERMAN, DAVID G. E. |
spellingShingle |
LIVERMAN, DAVID G. E. Sedimentology and history of a Late Wisconsinan glacial lake, Grande Prairie, Alberta, Canada |
author_facet |
LIVERMAN, DAVID G. E. |
author_sort |
LIVERMAN, DAVID G. E. |
title |
Sedimentology and history of a Late Wisconsinan glacial lake, Grande Prairie, Alberta, Canada |
title_short |
Sedimentology and history of a Late Wisconsinan glacial lake, Grande Prairie, Alberta, Canada |
title_full |
Sedimentology and history of a Late Wisconsinan glacial lake, Grande Prairie, Alberta, Canada |
title_fullStr |
Sedimentology and history of a Late Wisconsinan glacial lake, Grande Prairie, Alberta, Canada |
title_full_unstemmed |
Sedimentology and history of a Late Wisconsinan glacial lake, Grande Prairie, Alberta, Canada |
title_sort |
sedimentology and history of a late wisconsinan glacial lake, grande prairie, alberta, canada |
publisher |
Wiley |
publishDate |
1991 |
url |
http://dx.doi.org/10.1111/j.1502-3885.1991.tb00154.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1502-3885.1991.tb00154.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1502-3885.1991.tb00154.x |
long_lat |
ENVELOPE(-129.463,-129.463,58.259,58.259) |
geographic |
Canada Glacial Lake |
geographic_facet |
Canada Glacial Lake |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
Boreas volume 20, issue 3, page 241-257 ISSN 0300-9483 1502-3885 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1502-3885.1991.tb00154.x |
container_title |
Boreas |
container_volume |
20 |
container_issue |
3 |
container_start_page |
241 |
op_container_end_page |
257 |
_version_ |
1800753506623160320 |