Hogan, Kelly A; Dowdeswell, Julian A; Noormets, R; Evans, Jeffrey; Ó Cofaigh, Colm; Jakobsson, Martin (2010): (Table 2) AMS radiocarbon dates from sediment cores obtained during James Clark Ross cruise JR142, Kvitøya Trough [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.811288, Supplement to: Hogan, KA et al. (2010): Submarine landforms and ice-sheet flow in the Kvitøya Trough, northwestern Barents Sea. Quaternary Science Reviews, 29(25-26), 3545-3562, https://doi.org/10.1016/j.quascirev.2010.08.015
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Published: 2010 (exact date unknown) • DOI registered: 2013-06-03
Abstract:
High-resolution geophysical and sediment core data are used to investigate the pattern and dynamics of former ice flow in Kvitøya Trough, northwestern Barents Sea. A new swath-bathymetric dataset identifies three types of submarine landform in the study area (streamlined landforms, meltwater channels and cavities, iceberg scours). Subglacially produced streamlined landforms provide a record of ice flow through Kvitøya Trough during the last glaciation. Flow directions are inferred from the orientations of streamlined landforms (drumlins, crag-and-tail features). Ice flowed northward for at least 135 km from an ice divide at the southern end of Kvitøya Trough. A large channel-cavity system incised into bedrock in the southern trough indicates that subglacial meltwater was present at the former ice-sheet base. Modest landform elongation ratios and a lack of mega-scale glacial lineations suggest that, although ice in Kvitøya Trough was melting at the bed and flowed faster than the likely thin and cold-based ice on adjacent banks, a major ice stream probably did not occupy the trough. Retreat was relatively rapid after 14-13.5 14C kyr B.P. and probably progressed via ice sheet-bed decoupling in response to rising sea level. There is little evidence for still stands during ice retreat or of ice-proximal deglacial sediments. Relict iceberg scours in present-day water depths of more than 350 m in the northern trough indicate that calving was an important mass loss mechanism during retreat.
Project(s):
Coverage:
Median Latitude: 80.783945 * Median Longitude: 29.287995 * South-bound Latitude: 80.485990 * West-bound Longitude: 28.927100 * North-bound Latitude: 81.081900 * East-bound Longitude: 29.648890
Date/Time Start: 2006-08-01T00:00:00 * Date/Time End: 2006-08-01T00:00:00
Minimum DEPTH, sediment/rock: 0.99 m * Maximum DEPTH, sediment/rock: 1.98 m
Event(s):
JR142-GC10 * Latitude: 80.485990 * Longitude: 29.648890 * Date/Time: 2006-08-01T00:00:00 * Elevation: -443.0 m * Recovery: 2.23 m * Location: Svalbard Shelf * Campaign: JR20060728 (JR142) * Basis: James Clark Ross * Method/Device: Gravity corer (GC)
JR142-GC11 * Latitude: 81.081900 * Longitude: 28.927100 * Date/Time: 2006-08-01T00:00:00 * Elevation: -359.0 m * Recovery: 1.67 m * Location: Svalbard Shelf * Campaign: JR20060728 (JR142) * Basis: James Clark Ross * Method/Device: Gravity corer (GC)
Comment:
Data extracted in the frame of a joint ICSTI/PANGAEA IPY effort, see http://doi.pangaea.de/10.1594/PANGAEA.150150
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | ||||
| 2 | Latitude of event | Latitude | ||||
| 3 | Longitude of event | Longitude | ||||
| 4 | Core | Core | Hogan, Kelly A | |||
| 5 | DEPTH, sediment/rock | Depth sed | m | Geocode | ||
| 6 | Age, dated material | Dated material | Hogan, Kelly A | AIO = acid-insoluble organic carbon | ||
| 7 | Age, dated | Age dated | ka BP | Hogan, Kelly A | Age, 14C AMS | ka BP |
| 8 | Age, dated standard deviation | Age dated std dev | ± | Hogan, Kelly A | Age, 14C AMS |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
12 data points