A Lacustrine Glacier Retreat Sequence from the Permo-Carboniferous Dwyka Formation, Republic of South Africa
Abstract The upper part of a Permo-Carboniferous glacial valley fill along the northern margin of the Karoo Basin includes glacio-lacustrine sediments. During the last glacier advance into the lake, a bedded heterogeneous diamictite facies was deposited and, on glacier retreat, a sequence of deforme...
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Language: | English |
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Cambridge University Press (CUP)
1983
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Online Access: | http://dx.doi.org/10.1017/s0022143000030446 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000030446 |
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crcambridgeupr:10.1017/s0022143000030446 2024-03-03T08:46:02+00:00 A Lacustrine Glacier Retreat Sequence from the Permo-Carboniferous Dwyka Formation, Republic of South Africa Visser, J. N. J. 1983 http://dx.doi.org/10.1017/s0022143000030446 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000030446 en eng Cambridge University Press (CUP) Journal of Glaciology volume 29, issue 103, page 515-520 ISSN 0022-1430 1727-5652 Earth-Surface Processes journal-article 1983 crcambridgeupr https://doi.org/10.1017/s0022143000030446 2024-02-08T08:40:23Z Abstract The upper part of a Permo-Carboniferous glacial valley fill along the northern margin of the Karoo Basin includes glacio-lacustrine sediments. During the last glacier advance into the lake, a bedded heterogeneous diamictite facies was deposited and, on glacier retreat, a sequence of deformed siltstones with diamictite lenses and sandstone beds, varved shale and rhythmite shale was laid down. Black carbonaceous mud was deposited during the subsequent marine transgression. According to varve counts, the glacier receded from the valley over a period of 500 to 1 000 years and it is concluded that the overall ice-retreat rate during the Permo-Carboniferous deglaciation was relatively high. Article in Journal/Newspaper Journal of Glaciology Cambridge University Press Journal of Glaciology 29 103 515 520 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Earth-Surface Processes |
spellingShingle |
Earth-Surface Processes Visser, J. N. J. A Lacustrine Glacier Retreat Sequence from the Permo-Carboniferous Dwyka Formation, Republic of South Africa |
topic_facet |
Earth-Surface Processes |
description |
Abstract The upper part of a Permo-Carboniferous glacial valley fill along the northern margin of the Karoo Basin includes glacio-lacustrine sediments. During the last glacier advance into the lake, a bedded heterogeneous diamictite facies was deposited and, on glacier retreat, a sequence of deformed siltstones with diamictite lenses and sandstone beds, varved shale and rhythmite shale was laid down. Black carbonaceous mud was deposited during the subsequent marine transgression. According to varve counts, the glacier receded from the valley over a period of 500 to 1 000 years and it is concluded that the overall ice-retreat rate during the Permo-Carboniferous deglaciation was relatively high. |
format |
Article in Journal/Newspaper |
author |
Visser, J. N. J. |
author_facet |
Visser, J. N. J. |
author_sort |
Visser, J. N. J. |
title |
A Lacustrine Glacier Retreat Sequence from the Permo-Carboniferous Dwyka Formation, Republic of South Africa |
title_short |
A Lacustrine Glacier Retreat Sequence from the Permo-Carboniferous Dwyka Formation, Republic of South Africa |
title_full |
A Lacustrine Glacier Retreat Sequence from the Permo-Carboniferous Dwyka Formation, Republic of South Africa |
title_fullStr |
A Lacustrine Glacier Retreat Sequence from the Permo-Carboniferous Dwyka Formation, Republic of South Africa |
title_full_unstemmed |
A Lacustrine Glacier Retreat Sequence from the Permo-Carboniferous Dwyka Formation, Republic of South Africa |
title_sort |
lacustrine glacier retreat sequence from the permo-carboniferous dwyka formation, republic of south africa |
publisher |
Cambridge University Press (CUP) |
publishDate |
1983 |
url |
http://dx.doi.org/10.1017/s0022143000030446 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000030446 |
genre |
Journal of Glaciology |
genre_facet |
Journal of Glaciology |
op_source |
Journal of Glaciology volume 29, issue 103, page 515-520 ISSN 0022-1430 1727-5652 |
op_doi |
https://doi.org/10.1017/s0022143000030446 |
container_title |
Journal of Glaciology |
container_volume |
29 |
container_issue |
103 |
container_start_page |
515 |
op_container_end_page |
520 |
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1792501853736402944 |