Late Quaternary Rock Glaciers, Mount Kenya, Kenya
Abstract Rock glaciers in Teleki Valley on Mount Kenya exist above 4 000 m below steep valley walls where they are supplied with debris from avalanche couloirs. These valley-side rock glaciers consist of three or four lobes of rubble bounded by transverse furrows resulting from differential movement...
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Cambridge University Press (CUP)
1980
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Online Access: | http://dx.doi.org/10.1017/s0022143000015331 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000015331 |
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crcambridgeupr:10.1017/s0022143000015331 2024-03-03T08:46:09+00:00 Late Quaternary Rock Glaciers, Mount Kenya, Kenya Mahaney, W. C. 1980 http://dx.doi.org/10.1017/s0022143000015331 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000015331 en eng Cambridge University Press (CUP) Journal of Glaciology volume 25, issue 93, page 492-497 ISSN 0022-1430 1727-5652 Earth-Surface Processes journal-article 1980 crcambridgeupr https://doi.org/10.1017/s0022143000015331 2024-02-08T08:47:47Z Abstract Rock glaciers in Teleki Valley on Mount Kenya exist above 4 000 m below steep valley walls where they are supplied with debris from avalanche couloirs. These valley-side rock glaciers consist of three or four lobes of rubble bounded by transverse furrows resulting from differential movement. No ice cores were observed in these rubble sheets, but “drunken forest” stands of Senecio keniodendron indicate the probable presence of interstitial ice resulting either from the metamorphism of snow buried under rockfall and slide-rock debris, or from freezing of water beneath the rock mantle. A geological survey of Mount Kenya in 1976 revealed that rock glaciers are anomalous in the Mount Kenya Afroalpine zone above 3 300 m. Analysis of weathering rinds indicates that several rock-glacier lobes were built up over a short interval of time at or near the end of the last glacial maximum (Würm). Oversteepened fronts on the westernmost lobes may have resulted from re-activation coinciding with the advance of glaciers during late Holocene time (<1 000 B.P.). Soils mantle 20% of the rock-glacier surface and have morphological characteristics comparable with soils forming on moraines of late Würm age in upper Teleki, Hausberg, and Mackinder Valleys. Article in Journal/Newspaper Journal of Glaciology Cambridge University Press Journal of Glaciology 25 93 492 497 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Earth-Surface Processes |
spellingShingle |
Earth-Surface Processes Mahaney, W. C. Late Quaternary Rock Glaciers, Mount Kenya, Kenya |
topic_facet |
Earth-Surface Processes |
description |
Abstract Rock glaciers in Teleki Valley on Mount Kenya exist above 4 000 m below steep valley walls where they are supplied with debris from avalanche couloirs. These valley-side rock glaciers consist of three or four lobes of rubble bounded by transverse furrows resulting from differential movement. No ice cores were observed in these rubble sheets, but “drunken forest” stands of Senecio keniodendron indicate the probable presence of interstitial ice resulting either from the metamorphism of snow buried under rockfall and slide-rock debris, or from freezing of water beneath the rock mantle. A geological survey of Mount Kenya in 1976 revealed that rock glaciers are anomalous in the Mount Kenya Afroalpine zone above 3 300 m. Analysis of weathering rinds indicates that several rock-glacier lobes were built up over a short interval of time at or near the end of the last glacial maximum (Würm). Oversteepened fronts on the westernmost lobes may have resulted from re-activation coinciding with the advance of glaciers during late Holocene time (<1 000 B.P.). Soils mantle 20% of the rock-glacier surface and have morphological characteristics comparable with soils forming on moraines of late Würm age in upper Teleki, Hausberg, and Mackinder Valleys. |
format |
Article in Journal/Newspaper |
author |
Mahaney, W. C. |
author_facet |
Mahaney, W. C. |
author_sort |
Mahaney, W. C. |
title |
Late Quaternary Rock Glaciers, Mount Kenya, Kenya |
title_short |
Late Quaternary Rock Glaciers, Mount Kenya, Kenya |
title_full |
Late Quaternary Rock Glaciers, Mount Kenya, Kenya |
title_fullStr |
Late Quaternary Rock Glaciers, Mount Kenya, Kenya |
title_full_unstemmed |
Late Quaternary Rock Glaciers, Mount Kenya, Kenya |
title_sort |
late quaternary rock glaciers, mount kenya, kenya |
publisher |
Cambridge University Press (CUP) |
publishDate |
1980 |
url |
http://dx.doi.org/10.1017/s0022143000015331 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000015331 |
genre |
Journal of Glaciology |
genre_facet |
Journal of Glaciology |
op_source |
Journal of Glaciology volume 25, issue 93, page 492-497 ISSN 0022-1430 1727-5652 |
op_doi |
https://doi.org/10.1017/s0022143000015331 |
container_title |
Journal of Glaciology |
container_volume |
25 |
container_issue |
93 |
container_start_page |
492 |
op_container_end_page |
497 |
_version_ |
1792502130175639552 |