Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1080/08120090903416260 |
Age and origin of alluvial sediments within and flanking the Mt Lofty Ranges, southern South Australia: a Late Quaternary archive of climate and environmental change | |
Bourman, R. P.1; Prescott, J. R.2; Banerjee, D.3; Alley, N. F.4; Buckman, S.1 | |
通讯作者 | Bourman, R. P. |
来源期刊 | AUSTRALIAN JOURNAL OF EARTH SCIENCES
![]() |
ISSN | 0812-0099 |
出版年 | 2010 |
卷号 | 57期号:2页码:175-192 |
英文摘要 | Quaternary alluvial sediments occur within and on the flanks of the Mt Lofty Ranges of southern South Australia. Within the ranges they occupy colluvium-filled bedrock depressions, alluvial-fan sequences at hill/plain junctions and river terraces that flank major streamlines in both locations. Sediments ranging in age throughout the Quaternary have been identified, but this paper focuses on those deposits of Late Quaternary age. Luminescence dating has verified a Last Interglacial age (132-118 ka) for the most widespread of the alluvial units, the Pooraka Formation. A younger, Marine Isotope Stage 3, alluvial unit, in places containing bones of the extinct marsupial Diprotodon, has also been identified. Deposition of the alluvial sediments is associated with relatively warmer and wetter conditions, whereas the valleys that they occupy were eroded under drier climatic conditions. A more widespread occurrence of Stage 3 units is expected to be present but has not yet been verified. Cold, arid environments are inferred from the presence of dunes (18 ka) deposited during the Last Glacial Maximum when stream valleys were incised. Grey/black mid-Holocene alluvium (Waldeila Formation), forming present-day floodplains and low river terraces, equates with the Holocene Hypsithermal. The sequence of climatic changes revealed by these sediments is correlated with evidence of Late Quaternary climatic change from other Australian locations. The identification of equivalent units in different tectonic settings reveals that sedimentation is largely climatically driven although active tectonism may accelerate the supply of sediments available for transport. |
英文关键词 | climate change luminescence dating megafauna Mt Lofty Ranges Pooraka Formation Quaternary South Australia terrestrial sediments |
类型 | Article |
语种 | 英语 |
国家 | Australia ; India |
收录类别 | SCI-E |
WOS记录号 | WOS:000277464000002 |
WOS关键词 | REGENERATIVE-DOSE PROTOCOL ; RIVERINE PLAIN ; ADELAIDE AREA ; LUMINESCENCE ; QUARTZ ; SINGLE ; MEGAFAUNA ; HOLOCENE ; GRAINS ; EXTINCTION |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/163403 |
作者单位 | 1.Univ Wollongong, Sch Earth & Environm Sci, Wollongong, NSW 2522, Australia; 2.Univ Adelaide, Dept Phys & Math Phys, Adelaide, SA 5005, Australia; 3.Phys Res Lab, Planetary Sci & Explorat Grp, Ahmadabad 380009, Gujarat, India; 4.Univ Adelaide, Sch Earth & Environm Sci, Adelaide, SA 5005, Australia |
推荐引用方式 GB/T 7714 | Bourman, R. P.,Prescott, J. R.,Banerjee, D.,et al. Age and origin of alluvial sediments within and flanking the Mt Lofty Ranges, southern South Australia: a Late Quaternary archive of climate and environmental change[J],2010,57(2):175-192. |
APA | Bourman, R. P.,Prescott, J. R.,Banerjee, D.,Alley, N. F.,&Buckman, S..(2010).Age and origin of alluvial sediments within and flanking the Mt Lofty Ranges, southern South Australia: a Late Quaternary archive of climate and environmental change.AUSTRALIAN JOURNAL OF EARTH SCIENCES,57(2),175-192. |
MLA | Bourman, R. P.,et al."Age and origin of alluvial sediments within and flanking the Mt Lofty Ranges, southern South Australia: a Late Quaternary archive of climate and environmental change".AUSTRALIAN JOURNAL OF EARTH SCIENCES 57.2(2010):175-192. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。