Periglacial Landforms and Processes in the Southern Kenai Mountains, Alaska.
The distribution and characteristics of periglacial landforms in the southern Kenai Mountains, Alaska, were investigated during 1979 and 1980. The principal area of study was a 1300-m-high mountain mass that stood as a nunatak during the last general glaciation. Periglacial features in the area incl...
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ftdtic:ADA157459 2023-05-15T16:22:36+02:00 Periglacial Landforms and Processes in the Southern Kenai Mountains, Alaska. Bailey,P K COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH 1985-04 text/html http://www.dtic.mil/docs/citations/ADA157459 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA157459 en eng http://www.dtic.mil/docs/citations/ADA157459 APPROVED FOR PUBLIC RELEASE DTIC AND NTIS Snow Ice and Permafrost *MOUNTAINS *GLACIOLOGY *GEOMORPHOLOGY GROUND LEVEL MEASUREMENT TEMPERATURE EXPOSURE(GENERAL) ALASKA ISOLATION ICE PATTERNS SORTING FROST FLOW SEDIMENTS LANDFORMS GEOGRAPHIC DISTRIBUTION GLACIERS PERMAFROST STRIPES Nunataks Gelifluction *Periglacial land forms Kenai Mountains Patterned ground Cryoplanation terraces Nivation hollows Text 1985 ftdtic 2016-02-21T00:43:29Z The distribution and characteristics of periglacial landforms in the southern Kenai Mountains, Alaska, were investigated during 1979 and 1980. The principal area of study was a 1300-m-high mountain mass that stood as a nunatak during the last general glaciation. Periglacial features in the area include gelifluction lobes, nivation hollows, cryoplanation terraces, tors, a string bog, and such patterned ground as sorted circles, sorted polygons, earth hummocks, sorted steps, sorted stripes, and small ice-wedge polygons. Ground temperature measurements indicate that permafrost exists in only isolated patches but may have recently been much more extensive. The sorted polygons, cryoplanation terraces, and nivation hollows are relict features that have been inactive for a considerable time. The turf-banked sorted steps and large gelifluction lobes probably were active until the recent thawing of permafrost. Cryofraction and frost sorting still are vigorous, active progresses. Finely jointed bedrock, a previous colder environment, and long exposure in the absence of glacial ice has allowed periglacial processes to be the dominant surface agents both in the principal study area and in similar areas along the western side of the Kenai Mountains. Keywords: Gelifluction, Geomorphology, Kenai Mountains, Nunatak, Patterned Ground, Periglacial, Permafrost. Text glaciers Ice permafrost wedge* Alaska Defense Technical Information Center: DTIC Technical Reports database |
institution |
Open Polar |
collection |
Defense Technical Information Center: DTIC Technical Reports database |
op_collection_id |
ftdtic |
language |
English |
topic |
Snow Ice and Permafrost *MOUNTAINS *GLACIOLOGY *GEOMORPHOLOGY GROUND LEVEL MEASUREMENT TEMPERATURE EXPOSURE(GENERAL) ALASKA ISOLATION ICE PATTERNS SORTING FROST FLOW SEDIMENTS LANDFORMS GEOGRAPHIC DISTRIBUTION GLACIERS PERMAFROST STRIPES Nunataks Gelifluction *Periglacial land forms Kenai Mountains Patterned ground Cryoplanation terraces Nivation hollows |
spellingShingle |
Snow Ice and Permafrost *MOUNTAINS *GLACIOLOGY *GEOMORPHOLOGY GROUND LEVEL MEASUREMENT TEMPERATURE EXPOSURE(GENERAL) ALASKA ISOLATION ICE PATTERNS SORTING FROST FLOW SEDIMENTS LANDFORMS GEOGRAPHIC DISTRIBUTION GLACIERS PERMAFROST STRIPES Nunataks Gelifluction *Periglacial land forms Kenai Mountains Patterned ground Cryoplanation terraces Nivation hollows Bailey,P K Periglacial Landforms and Processes in the Southern Kenai Mountains, Alaska. |
topic_facet |
Snow Ice and Permafrost *MOUNTAINS *GLACIOLOGY *GEOMORPHOLOGY GROUND LEVEL MEASUREMENT TEMPERATURE EXPOSURE(GENERAL) ALASKA ISOLATION ICE PATTERNS SORTING FROST FLOW SEDIMENTS LANDFORMS GEOGRAPHIC DISTRIBUTION GLACIERS PERMAFROST STRIPES Nunataks Gelifluction *Periglacial land forms Kenai Mountains Patterned ground Cryoplanation terraces Nivation hollows |
description |
The distribution and characteristics of periglacial landforms in the southern Kenai Mountains, Alaska, were investigated during 1979 and 1980. The principal area of study was a 1300-m-high mountain mass that stood as a nunatak during the last general glaciation. Periglacial features in the area include gelifluction lobes, nivation hollows, cryoplanation terraces, tors, a string bog, and such patterned ground as sorted circles, sorted polygons, earth hummocks, sorted steps, sorted stripes, and small ice-wedge polygons. Ground temperature measurements indicate that permafrost exists in only isolated patches but may have recently been much more extensive. The sorted polygons, cryoplanation terraces, and nivation hollows are relict features that have been inactive for a considerable time. The turf-banked sorted steps and large gelifluction lobes probably were active until the recent thawing of permafrost. Cryofraction and frost sorting still are vigorous, active progresses. Finely jointed bedrock, a previous colder environment, and long exposure in the absence of glacial ice has allowed periglacial processes to be the dominant surface agents both in the principal study area and in similar areas along the western side of the Kenai Mountains. Keywords: Gelifluction, Geomorphology, Kenai Mountains, Nunatak, Patterned Ground, Periglacial, Permafrost. |
author2 |
COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH |
format |
Text |
author |
Bailey,P K |
author_facet |
Bailey,P K |
author_sort |
Bailey,P K |
title |
Periglacial Landforms and Processes in the Southern Kenai Mountains, Alaska. |
title_short |
Periglacial Landforms and Processes in the Southern Kenai Mountains, Alaska. |
title_full |
Periglacial Landforms and Processes in the Southern Kenai Mountains, Alaska. |
title_fullStr |
Periglacial Landforms and Processes in the Southern Kenai Mountains, Alaska. |
title_full_unstemmed |
Periglacial Landforms and Processes in the Southern Kenai Mountains, Alaska. |
title_sort |
periglacial landforms and processes in the southern kenai mountains, alaska. |
publishDate |
1985 |
url |
http://www.dtic.mil/docs/citations/ADA157459 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA157459 |
genre |
glaciers Ice permafrost wedge* Alaska |
genre_facet |
glaciers Ice permafrost wedge* Alaska |
op_source |
DTIC AND NTIS |
op_relation |
http://www.dtic.mil/docs/citations/ADA157459 |
op_rights |
APPROVED FOR PUBLIC RELEASE |
_version_ |
1766010602726096896 |