Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.aeolia.2017.12.002 |
Differential erosion and the formation of layered yardangs in the Loulan region (Lop Nur), eastern Tarim Basin | |
Lin, Yongchong1,2,4; Xu, Lishuai3; Mu, Guijin2,4 | |
通讯作者 | Lin, Yongchong ; Mu, Guijin |
来源期刊 | AEOLIAN RESEARCH |
ISSN | 1875-9637 |
EISSN | 2212-1684 |
出版年 | 2018 |
卷号 | 30页码:41-47 |
英文摘要 | Yardangs are a type of wind-sculpted landform which generally form in hyper-arid regions. Several factors affect the development of yardangs, and the relative importance of these factors likely varies with differences in regional environmental factors. In the Loulan region of Lop Nur, wind dynamics are the principal factor affecting the development of yardangs. However, layered yardangs, which have undergone a unique form of differential erosion, are common in the region. These erosional landforms differ from typical yardangs which are eroded solely by abrasion and deflation. We conducted field and laboratory investigations of layered yardangs to determine their origin. The results indicate that there are two types of strata comprising the yardangs: uncompacted sand-silt layers, with a lower carbonate content; and compacted clay-silt layers, with a higher carbonate content. Both types of strata are horizontal and occur in alternating layers. This type of structure enables the wind to more easily erode the less resistant sand-silt layers at different heights, leaving the more resistant compacted clay-silt layers relatively intact. Eventually the undercut remnant clay-silt layers collapse once the weight of the suspended strata exceeds their elastic resistance (more than 90% of the fallen blocks have length/thickness ratios between 1.2 and 2.5). Therefore, in addition to wind dynamics, the lithology and structure of the strata are important factors affecting the development of the layered yardangs. This type of differential erosion accelerates the development of the yardangs in the Loulan region. |
英文关键词 | Yardang Differential erosion Lithology Geomorphology Lop Nur |
类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
收录类别 | SCI-E |
WOS记录号 | WOS:000424187600005 |
WOS关键词 | WIND-TUNNEL ; CHINA ; DESERT ; SAND ; CALIFORNIA ; ORIGIN ; ANDES |
WOS类目 | Geography, Physical |
WOS研究方向 | Physical Geography |
来源机构 | 中国科学院新疆生态与地理研究所 |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/207226 |
作者单位 | 1.Minnan Normal Univ, Hist Dept, Zhangzhou 363000, Peoples R China; 2.Chinese Acad Sci, Xinjiang Inst Ecol & Geog, State Key Lab Desert & Oasis Ecol, Urumqi 830011, Peoples R China; 3.Shanxi Agr Univ, Coll Resources & Environm, Taigu 030801, Shanxi, Peoples R China; 4.Cele Natl Stn Observat & Res Desert Grassland Eco, Cele 848300, Peoples R China |
推荐引用方式 GB/T 7714 | Lin, Yongchong,Xu, Lishuai,Mu, Guijin. Differential erosion and the formation of layered yardangs in the Loulan region (Lop Nur), eastern Tarim Basin[J]. 中国科学院新疆生态与地理研究所,2018,30:41-47. |
APA | Lin, Yongchong,Xu, Lishuai,&Mu, Guijin.(2018).Differential erosion and the formation of layered yardangs in the Loulan region (Lop Nur), eastern Tarim Basin.AEOLIAN RESEARCH,30,41-47. |
MLA | Lin, Yongchong,et al."Differential erosion and the formation of layered yardangs in the Loulan region (Lop Nur), eastern Tarim Basin".AEOLIAN RESEARCH 30(2018):41-47. |
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