干旱区生态环境知识资源中心(Arid): Lateral stability of central Australian longitudinal dunes

Arid

DOI	10.1080/00049182.2018.1538644
	Lateral stability of central Australian longitudinal dunes
	Bourne, J. A.; Wopfner, H.; Twidale, C. R.
通讯作者	Twidale, CR (corresponding author), Univ Adelaide, Sch Phys & Earth Sci, Geol & Geophys, Adelaide, SA 5005, Australia.
来源期刊	AUSTRALIAN GEOGRAPHER
ISSN	0004-9182
EISSN	1465-3311
出版年	2019
卷号	50 期号:2 页码:155-167
英文摘要	Some authors consider that linear dunes migrate laterally on a grand scale, much as rivers move across floodplains. Others have concluded that lateral movement is limited in time and space. During the phase of dune initiation, small ribbons of sand formed in the lee of obstacles merge and coalesce to form recognisable linear dunes. Repeat observations demonstrate that mature sand ridges change position laterally a few metres either way within close limits defined by sand spillages on the slip or avalanche slopes that change orientation in response to changing sand-moving wind directions. This essay considers evidence by which to differentiate these two points of view. Supporting evidence for limited migration take the form of dunes resting on plinths of older alluvial substrates, some capped by gibber and that stand higher than adjacent interdune corridors. Such exposures show that the sand ridges have not migrated laterally during the last several tens of thousands of years. Migration is inhibited by clay cores, calcareous (calcrete) horizons, and the development of vegetated flanks. For these reasons, it is proposed that lateral migration be defined as a change of dune plan position that is greater than the maximum extent of sand deposition that develops in response to changes in the direction of sand-moving winds.
英文关键词	Simpson Desert linear longitudinal dune lateral migration and its definition dune stability
类型	Article
语种	英语
收录类别	SSCI
WOS记录号	WOS:000466424200003
WOS关键词	STRZELECKI DESERT ; SIMPSON DESERT ; LINEAR DUNES ; AGE ; BIRDSVILLE ; MIGRATION ; ALIGNMENT
WOS类目	Geography
WOS研究方向	Geography
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/369411
作者单位	[Bourne, J. A.; Twidale, C. R.] Univ Adelaide, Sch Phys & Earth Sci, Geol & Geophys, Adelaide, SA 5005, Australia; [Wopfner, H.] Univ Cologne, Dept Geol, Cologne, Germany
推荐引用方式 GB/T 7714	Bourne, J. A.,Wopfner, H.,Twidale, C. R.. Lateral stability of central Australian longitudinal dunes[J],2019,50(2):155-167.
APA	Bourne, J. A.,Wopfner, H.,&Twidale, C. R..(2019).Lateral stability of central Australian longitudinal dunes.AUSTRALIAN GEOGRAPHER,50(2),155-167.
MLA	Bourne, J. A.,et al."Lateral stability of central Australian longitudinal dunes".AUSTRALIAN GEOGRAPHER 50.2(2019):155-167.