Glacial geomorphology of the south Swedish uplands – focus on the spatial distribution of hummock tracts
We present the first comprehensive glacial-landform map of the south Swedish uplands (SSU), deglaciated 15–13 ka ago, using one consistent method and dataset; a Light Detection and Ranging-derived digital elevation model. In particular, this map focuses on the spatial distribution of hummock tracts....
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ftrepec:oai:RePEc:taf:tjomxx:v:13:y:2017:i:2:p:534-544 2023-05-15T16:41:00+02:00 Glacial geomorphology of the south Swedish uplands – focus on the spatial distribution of hummock tracts Gustaf Peterson Mark D. Johnson Colby A. Smith http://hdl.handle.net/10.1080/17445647.2017.1336121 unknown http://hdl.handle.net/10.1080/17445647.2017.1336121 article ftrepec 2020-12-04T13:41:49Z We present the first comprehensive glacial-landform map of the south Swedish uplands (SSU), deglaciated 15–13 ka ago, using one consistent method and dataset; a Light Detection and Ranging-derived digital elevation model. In particular, this map focuses on the spatial distribution of hummock tracts. The distribution of hummock tracts reinforces previous thinking of a broad lobate east–west zone of hummocks across the southern part of the SSU. But this map also reveals a pattern of hummock tracts confined in what we call hummock corridors that have a radial pattern sub-parallel to the overall ice-flow direction. Hummocks occur in a wide variety of morphologies, but we also show the distribution of two distinct forms: V-shaped hummocks and ‘ribbed moraine’. Cross-cutting relationships between hummocks and glacial lineations indicate a more complex chronology than previously suggested. In places, lineations are overlain by hummocks and in other places hummocks are overlain by lineations. Additionally, directional variation of glacial lineations together with a complex end-moraine pattern suggests a dynamic ice sheet with multiple small lobes. Finally, mapped end moraines help to better correlate the deglacial timescales of western and eastern Sweden. Article in Journal/Newspaper Ice Sheet RePEc (Research Papers in Economics) |
institution |
Open Polar |
collection |
RePEc (Research Papers in Economics) |
op_collection_id |
ftrepec |
language |
unknown |
description |
We present the first comprehensive glacial-landform map of the south Swedish uplands (SSU), deglaciated 15–13 ka ago, using one consistent method and dataset; a Light Detection and Ranging-derived digital elevation model. In particular, this map focuses on the spatial distribution of hummock tracts. The distribution of hummock tracts reinforces previous thinking of a broad lobate east–west zone of hummocks across the southern part of the SSU. But this map also reveals a pattern of hummock tracts confined in what we call hummock corridors that have a radial pattern sub-parallel to the overall ice-flow direction. Hummocks occur in a wide variety of morphologies, but we also show the distribution of two distinct forms: V-shaped hummocks and ‘ribbed moraine’. Cross-cutting relationships between hummocks and glacial lineations indicate a more complex chronology than previously suggested. In places, lineations are overlain by hummocks and in other places hummocks are overlain by lineations. Additionally, directional variation of glacial lineations together with a complex end-moraine pattern suggests a dynamic ice sheet with multiple small lobes. Finally, mapped end moraines help to better correlate the deglacial timescales of western and eastern Sweden. |
format |
Article in Journal/Newspaper |
author |
Gustaf Peterson Mark D. Johnson Colby A. Smith |
spellingShingle |
Gustaf Peterson Mark D. Johnson Colby A. Smith Glacial geomorphology of the south Swedish uplands – focus on the spatial distribution of hummock tracts |
author_facet |
Gustaf Peterson Mark D. Johnson Colby A. Smith |
author_sort |
Gustaf Peterson |
title |
Glacial geomorphology of the south Swedish uplands – focus on the spatial distribution of hummock tracts |
title_short |
Glacial geomorphology of the south Swedish uplands – focus on the spatial distribution of hummock tracts |
title_full |
Glacial geomorphology of the south Swedish uplands – focus on the spatial distribution of hummock tracts |
title_fullStr |
Glacial geomorphology of the south Swedish uplands – focus on the spatial distribution of hummock tracts |
title_full_unstemmed |
Glacial geomorphology of the south Swedish uplands – focus on the spatial distribution of hummock tracts |
title_sort |
glacial geomorphology of the south swedish uplands – focus on the spatial distribution of hummock tracts |
url |
http://hdl.handle.net/10.1080/17445647.2017.1336121 |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_relation |
http://hdl.handle.net/10.1080/17445647.2017.1336121 |
_version_ |
1766031441937825792 |