Knowledge Resource Center for Ecological Environment in Arid Area
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. |
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