Sedimentological investigations and age constraints of sediment cores from the outer Abbot trough, Amundsen Sea shelf
Cobertura |
MEDIAN LATITUDE: -71.814196 * MEDIAN LONGITUDE: -103.415551 * SOUTH-BOUND LATITUDE: -71.922600 * WEST-BOUND LONGITUDE: -104.337800 * NORTH-BOUND LATITUDE: -71.744160 * EAST-BOUND LONGITUDE: -103.326000 * DATE/TIME START: 2006-02-26T16:12:00 * DATE/TIME END: 2010-03-09T05:05:00 |
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Data(s) |
04/02/2016
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Resumo |
Knowing the extent of the West Antarctic Ice Sheet (WAIS) at the Last Glacial Maximum (LGM) is crucial for initiating and calibrating numerical ice sheet models that can predict future ice-sheet change and contributions to sea level. However, empirical data are lacking for key areas of outer continental shelves, where the LGM-WAIS must have terminated. We present detailed marine geophysical and geological data documenting an up to ~12 m-thick sequence of glaciomarine sediments within a relict glacial trough in the outer parts of the Amundsen Sea Embayment. Continuous deposition must have persisted here since at least >40 ka BP, pre-dating the established LGM by >13,000 years. Observations constrain the LGM grounding line to a distinct grounding-zone wedge ~100 km inland from the continental shelf edge. Thus, a substantial shelf area (~6000 km**2) remained ice free through the last glacial cycle. |
Formato |
application/zip, 16 datasets |
Identificador |
https://doi.pangaea.de/10.1594/PANGAEA.857881 doi:10.1594/PANGAEA.857881 |
Idioma(s) |
en |
Publicador |
PANGAEA |
Direitos |
CC-BY: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted |
Fonte |
Supplement to: Klages, Johann Philipp (2016): Sedimentological investigations and age constraints of sediment cores from the outer Abbot trough, Amundsen Sea shelf. in prep. |
Palavras-Chave | #<63 µm; >2 mm; 2000-63 µm; Age, 14C AMS; Age, 14C calibrated; Age, dated; Age, dated material; Age, standard deviation; Age dated; Age std dev; AWI_Paleo; Carbon, organic, total; Dated material; Depth; DEPTH, sediment/rock; Lab no; Magnetic susceptibility; MAGS; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Sample, optional label/labor no; Shear str; Shear strength, primary; Size fraction < 0.063 mm, mud, pelite, silt+clay; Size fraction > 2 mm, gravel; Size fraction 2.000-0.063 mm, sand; TOC; Velocity, compressional wave; Vp; Water content of wet mass; Water wm |
Tipo |
Dataset |