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LIBRIS Formathandbok  (Information om MARC21)
FältnamnIndikatorerMetadata
00004240naa a2200433 4500
001oai:DiVA.org:su-124161
003SwePub
008151215s2015 | |||||||||||000 ||eng|
0247 a https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-1241612 URI
0247 a https://doi.org/10.1016/j.geomorph.2015.08.0112 DOI
040 a (SwePub)su
041 a engb eng
042 9 SwePub
072 7a ref2 swepub-contenttype
072 7a art2 swepub-publicationtype
1001 a Freire, Francisu Stockholms universitet,Institutionen för geologiska vetenskaper4 aut0 (Swepub:su)ffrei
2451 0a High resolution mapping of offshore and onshore glaciogenic features in metamorphic bedrock terrain, Melville Bay, northwestern Greenland
264 1b Elsevier BV,c 2015
338 a print2 rdacarrier
520 a Geomorphological studies of previously glaciated landscapes are important to understand how ice sheets and glaciers respond to rapidly changing climate. Melville Bay, in northwestern Greenland, contains some of the most sensitive but least studied ice sheet sectors in the northern hemisphere, where the bathymetric knowledge previously was restricted to a few sparsely distributed single beam echo soundings. We present here the results of high-resolution, geomorphological mapping of the offshore and onshore landscapes in Melville Bay using multibeam sonar and satellite data, at 5- and 10-m resolutions respectively. The results show a similar areally-scoured bedrock-dominated landscape with a glacially modified cnoc-and-lochan morphology on the inner shelf (150-500 m depth) and on the nearby exposed coast. This is manifested by the presence of U-shaped troughs, moutonee-type elongated landforms, stoss-and-lee forms, and streamlined features. The submarine landscape shows features that are characteristic of bedrock in folded, faulted, and weathered metamorphic terrain, and, to a lesser extent, glacially molded bedforms; while coastal landforms exhibit higher relief, irregular-shaped basins, and more subdued fracture valleys. Although generally similar, the onshore and offshore landscapes contain examples of distinctly different landform patterns, which are interpreted to reflect a longer exposure to long-term deep weathering as well as to more recent periglacial weathering processes on land. The spatial variability in the distribution of landforms across the landscape in both study areas is mostly attributed to differences in lithological properties of the bedrock. The lack of sediment cover on the inner shelf is likely a result of a capacity for sediment erosion and removal by the West Greenland Current flowing northward over the area in combination with limited sediment supply from long sea ice-cover seasons. The distribution and orientation of the landforms in the offshore part indicate ice movement toward the NW, and suggests that this area acted as a tributary or onset region for the major paleo ice stream that formed the present day Melville Bay Trough.
650 7a NATURVETENSKAPx Geovetenskap och miljövetenskap0 (SwePub)1052 hsv//swe
650 7a NATURAL SCIENCESx Earth and Related Environmental Sciences0 (SwePub)1052 hsv//eng
653 a Melville Bay
653 a northwest Greenland
653 a Glacial erosional landforms
653 a High-resolution mapping
653 a Combined onshore-offshore mapping
653 a Marine Geology
653 a maringeologi
7001 a Gyllencreutz, Richardu Stockholms universitet,Institutionen för geologiska vetenskaper4 aut0 (Swepub:su)gylle
7001 a Greenwood, Sarah L.u Stockholms universitet,Institutionen för geologiska vetenskaper4 aut0 (Swepub:su)sgree
7001 a Mayer, Larry4 aut
7001 a Egilsson, Arnar4 aut
7001 a Thorsteinsson, Tomas4 aut
7001 a Jakobsson, Martinu Stockholms universitet,Institutionen för geologiska vetenskaper4 aut0 (Swepub:su)mjako
7102 a Stockholms universitetb Institutionen för geologiska vetenskaper4 org
7730 t Geomorphologyd : Elsevier BVg 250, s. 29-40q 250<29-40x 0169-555Xx 1872-695X
8564 8u https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-124161
8564 8u https://doi.org/10.1016/j.geomorph.2015.08.011

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