The glacial geomorphology of the western cordilleran ice sheet and Ahklun ice cap, Southern Alaska

Datos Bibliográficos

ID16840010
AutoresJeremy C Ely (0000-0003-4007-1500, University of Sheffield, autor de correspondencia), Emily A Gribble (University of Sheffield), Chris Clark (0000-0002-1021-6679, University of Sheffield), Chris D Clark
Año2016
Volumen12
Númerosup1
Páginas415-424
Fecha de publicación2016-11-04
Peer ReviewedSí
Open AccessSí
TipoARTICLE
RevistaJournal of Maps (JOURNAL)
Identificadores de la revistaISSN: 1744-5647 • E-ISSN: 1744-5647
EditorialInforma UK Limited (PUBLISHER • GB)
DOI10.1080/17445647.2016.1234981
OpenAlexW2525990715
IdiomaEN
Citas recibidas1
Referencias citadas38

During the late Wisconsinan, Southern Alaska was covered by two large ice masses; the western arm of the Cordilleran Ice Sheet and the Ahklun Mountains Ice Cap. Compared to the other ice sheets that existed during this period (e.g. the British-Irish, Laurentide and Fennoscandian ice sheets), little is known about the geomorphology they left behind. This limits our understanding of their flow pattern and retreat. Here we present systematic mapping of the glacial geomorphology of the two ice masses which existed in Southern Alaska. Due to spatially variable data availability, mapping was conducted using digital elevation models and satellite images of varying resolutions. Offshore, we map the glacial geomorphology using available bathymetric data. For the first time, we document >5000 subglacial lineations, recording ice flow direction. The distribution of moraines is presented, as well as features related to glacial meltwater drainage patterns (eskers and meltwater channels). Prominent troughs were also mapped on Alaska's continental shelf. This map provides the data required for a glacial inversion of these palaeo-ice masses

Antarctic sea ice · Arctic ice pack · Cryosphere · Geography · Geomorphology · Glacial landform · Glacial period · Ice sheet · Ice shelf · Ice stream · Lineation · Meltwater · Moraine · Physical geography · Sea ice · Seabed gouging by ice · Tectonics · Cryospheric studies and observations · Geology and Paleoclimatology Research · Landslides and related hazards · Geology · Oceanography · Paleontology