Different generation of controlled moraines in the glacier foreland of Midtdalsbreen, Norway

A series of small mounds (< 3m) were sampled in the foreland of Midtdalsbreen outlet glacier, southern Norway. These landforms were interesting, especially at site number 1 because they were located very close to a higher Little Ice Age (LIA) moraine (> 5 m), thereby informing the dynamic of t...

Full description

Bibliographic Details
Main Author: Allègre, Xavier
Format: Bachelor Thesis
Language:English
Published: Stockholms universitet, Institutionen för naturgeografi 2018
Subjects:
Ice
Online Access:http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-175533
id ftstockholmuniv:oai:DiVA.org:su-175533
record_format openpolar
spelling ftstockholmuniv:oai:DiVA.org:su-175533 2023-05-15T16:21:55+02:00 Different generation of controlled moraines in the glacier foreland of Midtdalsbreen, Norway Tvärställt styrda moränslätter alldeles invid Midtdalsbreen glaciär, Norge Allègre, Xavier 2018 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-175533 eng eng Stockholms universitet, Institutionen för naturgeografi http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-175533 info:eu-repo/semantics/openAccess Glacial sedimentology glaciology geomorphology palaeoenvironmental reconstruction Earth and Related Environmental Sciences Geovetenskap och miljövetenskap Student thesis info:eu-repo/semantics/bachelorThesis text 2018 ftstockholmuniv 2023-02-23T21:40:15Z A series of small mounds (< 3m) were sampled in the foreland of Midtdalsbreen outlet glacier, southern Norway. These landforms were interesting, especially at site number 1 because they were located very close to a higher Little Ice Age (LIA) moraine (> 5 m), thereby informing the dynamic of the glacier after the LIA at this location. It was yet to determine if these specific mounds are controlled moraines. If they are controlled moraines, then this would have implication for the glacier dynamics and the geometry of the snout after the LIA. It could be determined, based on the landform record evidence, whether the ice at the snout of Midtdalsbreen was thin and cold shortly after the LIA. Furthermore, whether the landscape was deglaciated by downwasting and then by backwasting was the main question addressed in relation to the nature of the mound and the thickness of ice at the snout during and after the LIA. In order to better understand the nature of the landform record and the mounds near the LIA moraine, satellite imagery coupled with careful field investigations were used in the foreland of the Midtdalsbreen outlet glacier. A geomorphological map was produced, and it was useful to put the mounds in a geographical context. Further sedimentological investigation; including clast-shape analyze, produced more evidence about the inner nature of these landforms. Both few controlled moraines and other landforms throughout the glacier foreland indicate that the ice geometry for Midtdalsbreen, shortly after the LIA was such that the snout of the glacier was a thin sheet of ice flowing against the previously deposited LIA moraine. The sedimentology of the controlled moraine is such that the sediments are deposited in steeply dipping layers, and they could even be misinterpreted as permafrost terrains at first glimpse. However, other sedimentological evidences such as the presence of sorted sand and sometimes dipping beds of gravels in addition to the geomorphological mapping make it meaningful to interpret few ... Bachelor Thesis glacier Ice permafrost Stockholm University: Publications (DiVA) Norway
institution Open Polar
collection Stockholm University: Publications (DiVA)
op_collection_id ftstockholmuniv
language English
topic Glacial sedimentology
glaciology
geomorphology
palaeoenvironmental reconstruction
Earth and Related Environmental Sciences
Geovetenskap och miljövetenskap
spellingShingle Glacial sedimentology
glaciology
geomorphology
palaeoenvironmental reconstruction
Earth and Related Environmental Sciences
Geovetenskap och miljövetenskap
Allègre, Xavier
Different generation of controlled moraines in the glacier foreland of Midtdalsbreen, Norway
topic_facet Glacial sedimentology
glaciology
geomorphology
palaeoenvironmental reconstruction
Earth and Related Environmental Sciences
Geovetenskap och miljövetenskap
description A series of small mounds (< 3m) were sampled in the foreland of Midtdalsbreen outlet glacier, southern Norway. These landforms were interesting, especially at site number 1 because they were located very close to a higher Little Ice Age (LIA) moraine (> 5 m), thereby informing the dynamic of the glacier after the LIA at this location. It was yet to determine if these specific mounds are controlled moraines. If they are controlled moraines, then this would have implication for the glacier dynamics and the geometry of the snout after the LIA. It could be determined, based on the landform record evidence, whether the ice at the snout of Midtdalsbreen was thin and cold shortly after the LIA. Furthermore, whether the landscape was deglaciated by downwasting and then by backwasting was the main question addressed in relation to the nature of the mound and the thickness of ice at the snout during and after the LIA. In order to better understand the nature of the landform record and the mounds near the LIA moraine, satellite imagery coupled with careful field investigations were used in the foreland of the Midtdalsbreen outlet glacier. A geomorphological map was produced, and it was useful to put the mounds in a geographical context. Further sedimentological investigation; including clast-shape analyze, produced more evidence about the inner nature of these landforms. Both few controlled moraines and other landforms throughout the glacier foreland indicate that the ice geometry for Midtdalsbreen, shortly after the LIA was such that the snout of the glacier was a thin sheet of ice flowing against the previously deposited LIA moraine. The sedimentology of the controlled moraine is such that the sediments are deposited in steeply dipping layers, and they could even be misinterpreted as permafrost terrains at first glimpse. However, other sedimentological evidences such as the presence of sorted sand and sometimes dipping beds of gravels in addition to the geomorphological mapping make it meaningful to interpret few ...
format Bachelor Thesis
author Allègre, Xavier
author_facet Allègre, Xavier
author_sort Allègre, Xavier
title Different generation of controlled moraines in the glacier foreland of Midtdalsbreen, Norway
title_short Different generation of controlled moraines in the glacier foreland of Midtdalsbreen, Norway
title_full Different generation of controlled moraines in the glacier foreland of Midtdalsbreen, Norway
title_fullStr Different generation of controlled moraines in the glacier foreland of Midtdalsbreen, Norway
title_full_unstemmed Different generation of controlled moraines in the glacier foreland of Midtdalsbreen, Norway
title_sort different generation of controlled moraines in the glacier foreland of midtdalsbreen, norway
publisher Stockholms universitet, Institutionen för naturgeografi
publishDate 2018
url http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-175533
geographic Norway
geographic_facet Norway
genre glacier
Ice
permafrost
genre_facet glacier
Ice
permafrost
op_relation http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-175533
op_rights info:eu-repo/semantics/openAccess
_version_ 1766009895565393920