Influence of rock jointing on the asymmetric form of the Ptarmigan Glacier valley, south-eastern Alaska
Jointing of rocks is concluded to be the main factor affecting the asymmetric form of the Ptarmigan Glacier valley. Fault lines control the general direction of the valley. In the paper the general influence of joints on the valley forms is also discussed. The most suitable conditions for the format...
Published in: | Bulletin of the Geological Society of Finland |
---|---|
Main Author: | |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Geological Society of Finland
1975
|
Subjects: | |
Online Access: | https://doi.org/10.17741/bgsf/47.1-2.005 https://doaj.org/article/233c3832d24a45248652d3785ce36edb |
id |
ftdoajarticles:oai:doaj.org/article:233c3832d24a45248652d3785ce36edb |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:233c3832d24a45248652d3785ce36edb 2023-05-15T16:20:26+02:00 Influence of rock jointing on the asymmetric form of the Ptarmigan Glacier valley, south-eastern Alaska M. Seppälä 1975-12-01T00:00:00Z https://doi.org/10.17741/bgsf/47.1-2.005 https://doaj.org/article/233c3832d24a45248652d3785ce36edb EN eng Geological Society of Finland http://www.geologinenseura.fi/bulletin/Volume47/sgs_bt_047_pages_033_044.pdf https://doaj.org/toc/0367-5211 https://doaj.org/toc/1799-4632 doi:10.17741/bgsf/47.1-2.005 0367-5211 1799-4632 https://doaj.org/article/233c3832d24a45248652d3785ce36edb Bulletin of the Geological Society of Finland, Vol 47, Iss 1-2, Pp 33-44 (1975) Geology QE1-996.5 article 1975 ftdoajarticles https://doi.org/10.17741/bgsf/47.1-2.005 2022-12-30T22:31:22Z Jointing of rocks is concluded to be the main factor affecting the asymmetric form of the Ptarmigan Glacier valley. Fault lines control the general direction of the valley. In the paper the general influence of joints on the valley forms is also discussed. The most suitable conditions for the formation of a symmetric U-shaped glacial valley exist when the dipping of the predominant joint sets is close 0°, 45° or 90° and the strike is parallel to the axis of the valley. Article in Journal/Newspaper glacier Alaska Directory of Open Access Journals: DOAJ Articles Bulletin of the Geological Society of Finland 47 1-2 33 44 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Geology QE1-996.5 |
spellingShingle |
Geology QE1-996.5 M. Seppälä Influence of rock jointing on the asymmetric form of the Ptarmigan Glacier valley, south-eastern Alaska |
topic_facet |
Geology QE1-996.5 |
description |
Jointing of rocks is concluded to be the main factor affecting the asymmetric form of the Ptarmigan Glacier valley. Fault lines control the general direction of the valley. In the paper the general influence of joints on the valley forms is also discussed. The most suitable conditions for the formation of a symmetric U-shaped glacial valley exist when the dipping of the predominant joint sets is close 0°, 45° or 90° and the strike is parallel to the axis of the valley. |
format |
Article in Journal/Newspaper |
author |
M. Seppälä |
author_facet |
M. Seppälä |
author_sort |
M. Seppälä |
title |
Influence of rock jointing on the asymmetric form of the Ptarmigan Glacier valley, south-eastern Alaska |
title_short |
Influence of rock jointing on the asymmetric form of the Ptarmigan Glacier valley, south-eastern Alaska |
title_full |
Influence of rock jointing on the asymmetric form of the Ptarmigan Glacier valley, south-eastern Alaska |
title_fullStr |
Influence of rock jointing on the asymmetric form of the Ptarmigan Glacier valley, south-eastern Alaska |
title_full_unstemmed |
Influence of rock jointing on the asymmetric form of the Ptarmigan Glacier valley, south-eastern Alaska |
title_sort |
influence of rock jointing on the asymmetric form of the ptarmigan glacier valley, south-eastern alaska |
publisher |
Geological Society of Finland |
publishDate |
1975 |
url |
https://doi.org/10.17741/bgsf/47.1-2.005 https://doaj.org/article/233c3832d24a45248652d3785ce36edb |
genre |
glacier Alaska |
genre_facet |
glacier Alaska |
op_source |
Bulletin of the Geological Society of Finland, Vol 47, Iss 1-2, Pp 33-44 (1975) |
op_relation |
http://www.geologinenseura.fi/bulletin/Volume47/sgs_bt_047_pages_033_044.pdf https://doaj.org/toc/0367-5211 https://doaj.org/toc/1799-4632 doi:10.17741/bgsf/47.1-2.005 0367-5211 1799-4632 https://doaj.org/article/233c3832d24a45248652d3785ce36edb |
op_doi |
https://doi.org/10.17741/bgsf/47.1-2.005 |
container_title |
Bulletin of the Geological Society of Finland |
container_volume |
47 |
container_issue |
1-2 |
container_start_page |
33 |
op_container_end_page |
44 |
_version_ |
1766008346432765952 |