Beryllium ages, sedimentology and weathering characteristics of Reedy Glacier deposits
| Cobertura |
MEDIAN LATITUDE: -85.960894 * MEDIAN LONGITUDE: -129.764313 * SOUTH-BOUND LATITUDE: -86.066700 * WEST-BOUND LONGITUDE: -132.757750 * NORTH-BOUND LATITUDE: -85.904750 * EAST-BOUND LONGITUDE: -126.050000 |
|---|---|
| Data(s) |
26/02/2010
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| Resumo |
Deposits corresponding to multiple periods of glaciation are preserved in ice-free areas adjacent to Reedy Glacier, southern Transantarctic Mountains. Glacial geologic mapping, supported by 10Be surface-exposure dating, shows that Reedy Glacier was significantly thicker than today multiple times during the mid-to-late Cenozoic. Longitudinal-surface profiles reconstructed from the upper limits of deposits indicate greater thickening at the glacier mouth than at the head during these episodes, indicating that Reedy Glacier responded primarily to changes in the thickness of the West Antarctic Ice Sheet. Surface-exposure ages suggest this relationship has been in place since at least 5 Ma. The last period of thickening of Reedy Glacier occurred during Marine Isotope Stage 2, at which time the glacier surface near its confluence with the West Antarctic Ice Sheet was at least 500 m higher than today. |
| Formato |
application/zip, 3 datasets |
| Identificador |
https://doi.pangaea.de/10.1594/PANGAEA.808064 doi:10.1594/PANGAEA.808064 |
| Idioma(s) |
en |
| Publicador |
PANGAEA |
| Direitos |
CC-BY: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted |
| Fonte |
Supplement to: Bromley, Gordon RM; Hall, Brenda L; Stone, John O; Conway, Howard; Todd, Claire E (2010): Late Cenozoic deposits at Reedy Glacier, Transantarctic Mountains: implications for former thickness of the West Antarctic Ice Sheet. Quaternary Science Reviews, 29(3-4), 384-398, doi:10.1016/j.quascirev.2009.07.001 |
| Palavras-Chave | #-; 10Be; 10Be conc.; 10Be prod; 10Be prod. rate; 10Be std dev; Accelerator mass spectrometry (AMS); Age, 10Beryllium; Age, dated; Age, dated standard deviation; Age, error; Age dated; Age e; Age std dev; Beryllium 10; Beryllium 10, production rate per year; Beryllium 10, standard deviation; broken; cavernous weathering of surface boulders; Clasts; Comment; corr; Correction; CsD: clast-supported diamicton; MsD: matrix-supported diamicton; (ms): moderately sorted; (us): unsorted; (sr): silt-rich; (sd): sand-rich; (cr): clay-rich; (sr/sd): (silty-sandy); (gr): gravel rich; deflation pavement; Depth, relative; Depth rel; Description; desert-varnished; drift; drift unit; Elevation; ELEVATION; Event; exposure age; ghosts (highly rotten clasts lacking structural integrity); glacially moulded; gneissic granite (Gngr), granite (Gr), granodiorite (Grdi), microgranite (Mcgr), mafics (Maf), shales, sandstone (SS), and quartz (Qtz); horizon; internal [ka]; International Polar Year (2007-2008); IPY; Latitude; LATITUDE; Layer thickness; Lithologic unit/sequence; Lithology; Lithology/composition/facies; Longitude; LONGITUDE; no. analyzed; Obs; Observation; of clasts, A: Angular clasts; SA: Sub-angular clasts; patterned ground; pitted; planed boulders; Sample ID; scaling (muons); scaling (spallation); striated; surface oxid. stage 1; surface oxid. stage 2; surface oxid. stage 3; surface oxid. stage 4; thickness; Thickness; Unit; Ventifact; Ventifacts; weathering depth; weathering stage 1; weathering stage 2; weathering stage 3; weathering stage 4; with calcite accumulations; with surface salt accumulation |
| Tipo |
Dataset |
