Howe lake: a hydrodynamic blowout structure
Howe Lake (formerly called "Goudie Lake") is an unusual feature of southeast Saskatchewan. Almost perfectly circular (diameter 295 m), it is much deeper (26 m) than almost any other prairie lake. Initially noted in 1952, numerous investigations culminated in deep drilling and geophysical p...
Published in: | Canadian Journal of Earth Sciences |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Canadian Science Publishing
1982
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1139/e82-097 http://www.nrcresearchpress.com/doi/pdf/10.1139/e82-097 |
id |
crcansciencepubl:10.1139/e82-097 |
---|---|
record_format |
openpolar |
spelling |
crcansciencepubl:10.1139/e82-097 2024-09-15T18:12:29+00:00 Howe lake: a hydrodynamic blowout structure Christiansen, E. A. Gendzwill, D. J. Meneley, W. A. 1982 http://dx.doi.org/10.1139/e82-097 http://www.nrcresearchpress.com/doi/pdf/10.1139/e82-097 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 19, issue 6, page 1122-1139 ISSN 0008-4077 1480-3313 journal-article 1982 crcansciencepubl https://doi.org/10.1139/e82-097 2024-07-25T04:10:07Z Howe Lake (formerly called "Goudie Lake") is an unusual feature of southeast Saskatchewan. Almost perfectly circular (diameter 295 m), it is much deeper (26 m) than almost any other prairie lake. Initially noted in 1952, numerous investigations culminated in deep drilling and geophysical programs in the 1969–1976 period. The lake is the surface expression of a deep, funnel-shaped depression filled with coarse colluvium at the bottom and finer material near the top. A central pipe extends to a depth of at least 138 m. Radiocarbon dates and the history of deglaciation give evidence that the structure was formed between 12 000 and 12 500 years BP, shortly after the last ice sheet melted in the area. The structure was probably formed by a hydrodynamic blowout of water from the Mannville Group 400 m below surface. Extreme overpressure of water in the Mannville Group was probably induced by recharge from meltwater of the continental glacier then standing a few kilometres to the north of Howe Lake. The blowout was initiated at Howe Lake by fractures in the subsurface, related to a salt solution-collapse structure. Howe Lake probably served as a valve controlling the artesian pressure in the Mannville Group over a large area, until the active ice margin had retreated northeastward exposing lower elevation discharge areas. Hydrodynamic blowouts provide another process for the origin of breccia-filled pipes. Article in Journal/Newspaper Ice Sheet Canadian Science Publishing Canadian Journal of Earth Sciences 19 6 1122 1139 |
institution |
Open Polar |
collection |
Canadian Science Publishing |
op_collection_id |
crcansciencepubl |
language |
English |
description |
Howe Lake (formerly called "Goudie Lake") is an unusual feature of southeast Saskatchewan. Almost perfectly circular (diameter 295 m), it is much deeper (26 m) than almost any other prairie lake. Initially noted in 1952, numerous investigations culminated in deep drilling and geophysical programs in the 1969–1976 period. The lake is the surface expression of a deep, funnel-shaped depression filled with coarse colluvium at the bottom and finer material near the top. A central pipe extends to a depth of at least 138 m. Radiocarbon dates and the history of deglaciation give evidence that the structure was formed between 12 000 and 12 500 years BP, shortly after the last ice sheet melted in the area. The structure was probably formed by a hydrodynamic blowout of water from the Mannville Group 400 m below surface. Extreme overpressure of water in the Mannville Group was probably induced by recharge from meltwater of the continental glacier then standing a few kilometres to the north of Howe Lake. The blowout was initiated at Howe Lake by fractures in the subsurface, related to a salt solution-collapse structure. Howe Lake probably served as a valve controlling the artesian pressure in the Mannville Group over a large area, until the active ice margin had retreated northeastward exposing lower elevation discharge areas. Hydrodynamic blowouts provide another process for the origin of breccia-filled pipes. |
format |
Article in Journal/Newspaper |
author |
Christiansen, E. A. Gendzwill, D. J. Meneley, W. A. |
spellingShingle |
Christiansen, E. A. Gendzwill, D. J. Meneley, W. A. Howe lake: a hydrodynamic blowout structure |
author_facet |
Christiansen, E. A. Gendzwill, D. J. Meneley, W. A. |
author_sort |
Christiansen, E. A. |
title |
Howe lake: a hydrodynamic blowout structure |
title_short |
Howe lake: a hydrodynamic blowout structure |
title_full |
Howe lake: a hydrodynamic blowout structure |
title_fullStr |
Howe lake: a hydrodynamic blowout structure |
title_full_unstemmed |
Howe lake: a hydrodynamic blowout structure |
title_sort |
howe lake: a hydrodynamic blowout structure |
publisher |
Canadian Science Publishing |
publishDate |
1982 |
url |
http://dx.doi.org/10.1139/e82-097 http://www.nrcresearchpress.com/doi/pdf/10.1139/e82-097 |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
Canadian Journal of Earth Sciences volume 19, issue 6, page 1122-1139 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e82-097 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
19 |
container_issue |
6 |
container_start_page |
1122 |
op_container_end_page |
1139 |
_version_ |
1810450071642177536 |