Loading...
Please wait, while we are loading the content...
Similar Documents
Rapid age assessment of glacial landforms in the Pyrenees using Schmidt hammer exposure dating (SHED)
| Content Provider | Scilit |
|---|---|
| Author | Tomkins, Matt D. Dortch, Jason M. Hughes, Philip D. Huck, Jonny J. Stimson, Andrew G. Delmas, Magali Calvet, Marc Pallàs, Raimon |
| Copyright Year | 2018 |
| Description | Schmidt hammer (SH) sampling of 54$ ^{10}$Be-dated granite surfaces from the Pyrenees reveals a clear relationship between exposure and weathering through time (n=52, $R^{2}$=0.96, P<0.01) and permits the use of the SH as a numerical dating tool. To test this$ ^{10}$Be-SH calibration curve, 100 surfaces were sampled from five ice-front positions in the Têt catchment, eastern Pyrenees, with results verified against independent$ ^{10}$Be and$ ^{14}$C ages. Gaussian modelling differentiates Holocene (9.4±0.6 ka), Younger Dryas (12.6±0.9 ka), Oldest Dryas (16.1±0.5 ka), last glacial maximum (LGM; 24.8±0.9 ka) and Würmian maximum ice extent stages (MIE; 40.9±1.1 ka). These data confirm comparable glacier lengths during the LGM and MIE (~300 m difference), in contrast to evidence from the western Pyrenees (≥15 km), reflecting the relative influence of Atlantic and Mediterranean climates. Moreover, Pyrenean glaciers advanced significantly during the LGM, with a local maximum at ~25 ka, driven by growth of the Laurentide Ice Sheet, southward advection of the polar front, and a solar radiation minimum in the Northern Hemisphere. This calibration curve is available online (http://shed.earth) to enable wider application of this method throughout the Pyrenees. |
| Related Links | https://www.research.manchester.ac.uk/portal/files/70315048/Tomkinsetal2018_QuaternaryResearch.pdf https://www.cambridge.org/core/services/aop-cambridge-core/content/view/8BEE6D3F906E0B6A405F535BC8C3165E/S0033589418000121a.pdf/div-class-title-rapid-age-assessment-of-glacial-landforms-in-the-pyrenees-using-schmidt-hammer-exposure-dating-shed-div.pdf |
| Ending Page | 37 |
| Page Count | 12 |
| Starting Page | 26 |
| ISSN | 00335894 |
| e-ISSN | 10960287 |
| DOI | 10.1017/qua.2018.12 |
| Journal | Quaternary Research |
| Issue Number | 1 |
| Volume Number | 90 |
| Language | English |
| Publisher | Cambridge University Press (CUP) |
| Publisher Date | 2018-07-01 |
| Access Restriction | Open |
| Subject Keyword | Quaternary Research Physical Geography Schmidt Hammer Exposure Dating Glacier Chronology Terrestrial Cosmogenic Nuclide Dating Last Glacial Maximum |
| Content Type | Text |
| Resource Type | Article |
| Subject | Earth-Surface Processes Arts and Humanities |
