Shear phenomena in ice-thrust gravels, central Alberta
Pressures exerted by the continental ice sheet produced sheared zones and a pervasive crushing of strong quartzite clasts in preglacial Saskatchewan Gravels of central Alberta. Where deformation is of moderate intensity clasts have fractured at points of impingement with other clasts, and clasts of...
Published in: | Canadian Journal of Earth Sciences |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Canadian Science Publishing
1978
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1139/e78-028 http://www.nrcresearchpress.com/doi/pdf/10.1139/e78-028 |
id |
crcansciencepubl:10.1139/e78-028 |
---|---|
record_format |
openpolar |
spelling |
crcansciencepubl:10.1139/e78-028 2023-12-17T10:31:46+01:00 Shear phenomena in ice-thrust gravels, central Alberta Babcock, E. A. Fenton, M. M. Andriashek, L. D. 1978 http://dx.doi.org/10.1139/e78-028 http://www.nrcresearchpress.com/doi/pdf/10.1139/e78-028 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 15, issue 2, page 277-283 ISSN 0008-4077 1480-3313 General Earth and Planetary Sciences journal-article 1978 crcansciencepubl https://doi.org/10.1139/e78-028 2023-11-19T13:39:20Z Pressures exerted by the continental ice sheet produced sheared zones and a pervasive crushing of strong quartzite clasts in preglacial Saskatchewan Gravels of central Alberta. Where deformation is of moderate intensity clasts have fractured at points of impingement with other clasts, and clasts of 3–6 cm in the longest dimension are most likely to be shattered. In zones of intense shear nearly all clasts larger than coarse sand have been crushed and drawn out into lensoid masses.An index of fracturing was devised to measure the degree of ice pressure induced deformation where the gravels show no evidence of having been disturbed. A model that defines possible conditions at the time of deformation is presented. Article in Journal/Newspaper Ice Sheet Canadian Science Publishing (via Crossref) Canadian Journal of Earth Sciences 15 2 277 283 |
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 Babcock, E. A. Fenton, M. M. Andriashek, L. D. Shear phenomena in ice-thrust gravels, central Alberta |
topic_facet |
General Earth and Planetary Sciences |
description |
Pressures exerted by the continental ice sheet produced sheared zones and a pervasive crushing of strong quartzite clasts in preglacial Saskatchewan Gravels of central Alberta. Where deformation is of moderate intensity clasts have fractured at points of impingement with other clasts, and clasts of 3–6 cm in the longest dimension are most likely to be shattered. In zones of intense shear nearly all clasts larger than coarse sand have been crushed and drawn out into lensoid masses.An index of fracturing was devised to measure the degree of ice pressure induced deformation where the gravels show no evidence of having been disturbed. A model that defines possible conditions at the time of deformation is presented. |
format |
Article in Journal/Newspaper |
author |
Babcock, E. A. Fenton, M. M. Andriashek, L. D. |
author_facet |
Babcock, E. A. Fenton, M. M. Andriashek, L. D. |
author_sort |
Babcock, E. A. |
title |
Shear phenomena in ice-thrust gravels, central Alberta |
title_short |
Shear phenomena in ice-thrust gravels, central Alberta |
title_full |
Shear phenomena in ice-thrust gravels, central Alberta |
title_fullStr |
Shear phenomena in ice-thrust gravels, central Alberta |
title_full_unstemmed |
Shear phenomena in ice-thrust gravels, central Alberta |
title_sort |
shear phenomena in ice-thrust gravels, central alberta |
publisher |
Canadian Science Publishing |
publishDate |
1978 |
url |
http://dx.doi.org/10.1139/e78-028 http://www.nrcresearchpress.com/doi/pdf/10.1139/e78-028 |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
Canadian Journal of Earth Sciences volume 15, issue 2, page 277-283 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e78-028 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
15 |
container_issue |
2 |
container_start_page |
277 |
op_container_end_page |
283 |
_version_ |
1785585158472073216 |