Arid
DOI10.1016/j.palaeo.2011.10.008
Sand ramps in the Golden Gate Highlands National Park, South Africa: Evidence of periglacial aeolian activity during the last glacial
Telfer, M. W.1,2; Thomas, Z. A.3; Breman, E.4
通讯作者Telfer, M. W.
来源期刊PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
ISSN0031-0182
EISSN1872-616X
出版年2012
卷号313页码:59-69
英文摘要

Sand ramps have been identified in a side-valley on the southern side of the Little Caledon River in the Golden Gate Highlands National Park, Free State, South Africa. The site lies in the foothills of the northern Drakensberg (Maluti) Mountains, and this study aims to explore the potential of such deposits to add to the sparse palaeoenvironmental record of the region. Up to 11 m of aeolian sand, banked against north-facing slopes, is exposed by fluvial incision through the deposits, revealing interbedded fluvial lenses and palaeosols. The region is currently devoid of significant aeolian sediment transport or deposition, and supports well-developed grassland vegetation; these deposits testify to former conditions different from those of today, which would have been characterised by depleted vegetation and a different wind and/or climatic regime. Biogenic proxies are absent from the deposits, but Optically-Stimulated Luminescence (OSL) dating of the sediments reveals that they accumulated at intervals throughout much of the last glacial event, from around 45 to 16 ka. These dates are consistent with those of vegetation changes from palaeoecological sites elsewhere in the region, and also with dated evidence for niche glaciation further south in the high Drakensberg. Evidence from this study supports significant landscape changes in the Drakensberg during the last glacial, with the foothills in the region of Golden Gate Highlands National Park subject to aeolian processes under a periglacial environment. (C) 2011 Elsevier B.V. All rights reserved.


英文关键词Late Quaternary Sand ramp Periglacial Last Glacial Maximum OSL dating Phytoliths
类型Article
语种英语
国家England
收录类别SCI-E
WOS记录号WOS:000300135500004
WOS关键词QUATERNARY ENVIRONMENTAL-CHANGE ; REGENERATIVE-DOSE PROTOCOL ; EAST CAPE DRAKENSBERG ; ORANGE-FREE-STATE ; PRETORIA SALTPAN ; MOJAVE DESERT ; VEGETATION HISTORY ; BRAAMHOEK WETLAND ; LUNETTE DUNES ; POLLEN
WOS类目Geography, Physical ; Geosciences, Multidisciplinary ; Paleontology
WOS研究方向Physical Geography ; Geology ; Paleontology
来源机构University of Oxford
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/174295
作者单位1.Univ Plymouth, Sch Geog Earth & Environm Sci, Plymouth PL4 8AA, Devon, England;
2.Univ Oxford, Sch Geog & Environm, Oxford OX1 3QY, England;
3.Univ Exeter, Sch Geog, Exeter EX4 4RJ, Devon, England;
4.Univ Oxford, Dept Zool, Biodivers Inst, Oxford Long Term Ecol Lab, Oxford OX1 3PS, England
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GB/T 7714
Telfer, M. W.,Thomas, Z. A.,Breman, E.. Sand ramps in the Golden Gate Highlands National Park, South Africa: Evidence of periglacial aeolian activity during the last glacial[J]. University of Oxford,2012,313:59-69.
APA Telfer, M. W.,Thomas, Z. A.,&Breman, E..(2012).Sand ramps in the Golden Gate Highlands National Park, South Africa: Evidence of periglacial aeolian activity during the last glacial.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,313,59-69.
MLA Telfer, M. W.,et al."Sand ramps in the Golden Gate Highlands National Park, South Africa: Evidence of periglacial aeolian activity during the last glacial".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 313(2012):59-69.
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