Knowledge Resource Center for Ecological Environment in Arid Area
| DOI | 10.1016/j.quaint.2023.02.002 |
| Sand, wind, paleosols, war: Late Quaternary aeolian dynamics in the Selima Sand Sheet Region, Darb el Arba?in Desert, Southern Egypt | |
| Nicoll, Kathleen | |
| 通讯作者 | Nicoll, K |
| 来源期刊 | QUATERNARY INTERNATIONAL
 |
| ISSN | 1040-6182 |
| EISSN | 1873-4553 |
| 出版年 | 2023 |
| 卷号 | 657页码:37-49 |
| 英文摘要 | First scientifically documented by the British explorer and soldier Ralph Alger Bagnold, the Selima Sand Sheet is an extensive low-relief area located within the modern hyperarid core of the Eastern Sahara. Field survey and trenching reveal a surface mantle of near 'pinstripe laminated aeolian sands that comprise active chevron (or zibar) bedforms, which are apparent on satellite datasets. These active sands cover Quaternary paleosols with morphostratigraphic characteristics that reflect differing degrees of soil development over time as a function of in situ weathering of quartz parent materials, addition of silts and clays via illuviation and eluviation processes, the precipitation of carbonates, rubification, and bioturbation by plants and insects. A relative chronostratigraphy is inferred from the associated archaeological (Neolithic) and historical materials (Late Historic to World War II), and absolute ages for these deposits are provided by optical dates using single aliquot regeneration techniques (SAR). Constraining the timing of aeolian sedimentation provides a basis for reconstructing paleoenvironmental changes and pedogenesis over Late Quaternary timescales in this region of northeast Africa. Accretion of the sand sheet was episodic and occurred during time periods of enhanced aeolian activity at-20-14 and-5-3 ka years ago. Late Pleistocene deposition of the sand sheet was out-of-phase with the widely recognized period of rainwater-fed pluvial playa lake formation and wadi river drainage alluviation documented in the Sahara, which resulted from enhanced monsoonal rains associated with the orbitally-forced precessional insolation maximum in the Northern Hemisphere. Enhanced bioturbation processes associated with wet phases during the Holocene have completely obliterated most primary sedimentary structures in the Pleistocene-aged sand sheet, resulting in the development of a cohesive, coarse sand and granule-dominated deposit exhibiting incipient prismatic soil structural development. The younger sand sheets dating to the Late Holocene (-4-3 ka years ago) preserve primary sedimentary structures (e.g. planar laminations), and increasing amounts of cohesion and structure with age. Reconstructing the maximum estimated accumulation rates, and assuming approximately uniform rates of sedimentation across the Selima Sand Sheet area, sediment storage within the sand sheet may be on the order of-7 km3/1000 years during the time period that has elapsed since the mid-Holocene onset of arid conditions. |
| 英文关键词 | Aeolian Sand sheet Geoarchaeology Sahara desert |
| 类型 | Article |
| 语种 | 英语 |
| 开放获取类型 | Bronze |
| 收录类别 | SCI-E |
| WOS记录号 | WOS:000986654300001 |
| WOS关键词 | NORTH-AFRICA ; EASTERN SAHARA ; LIBYAN DESERT ; PALEOCLIMATIC SIGNIFICANCE ; HYDROCLIMATIC CHANGE ; CLIMATIC CHANGES ; OASIS REGION ; HUMID PERIOD ; TRADE-WINDS ; HOLOCENE |
| WOS类目 | Geography, Physical ; Geosciences, Multidisciplinary |
| WOS研究方向 | Physical Geography ; Geology |
| 资源类型 | 期刊论文 |
| 条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/398192 |
| 推荐引用方式 GB/T 7714 | Nicoll, Kathleen. Sand, wind, paleosols, war: Late Quaternary aeolian dynamics in the Selima Sand Sheet Region, Darb el Arba?in Desert, Southern Egypt[J],2023,657:37-49. |
| APA | Nicoll, Kathleen.(2023).Sand, wind, paleosols, war: Late Quaternary aeolian dynamics in the Selima Sand Sheet Region, Darb el Arba?in Desert, Southern Egypt.QUATERNARY INTERNATIONAL,657,37-49. |
| MLA | Nicoll, Kathleen."Sand, wind, paleosols, war: Late Quaternary aeolian dynamics in the Selima Sand Sheet Region, Darb el Arba?in Desert, Southern Egypt".QUATERNARY INTERNATIONAL 657(2023):37-49. |
| 条目包含的文件 | 条目无相关文件。 | |||||
| 个性服务 |
| 推荐该条目 |
| 保存到收藏夹 |
| 导出为Endnote文件 |
| 谷歌学术 |
| 谷歌学术中相似的文章 |
| [Nicoll, Kathleen]的文章 |
| 百度学术 |
| 百度学术中相似的文章 |
| [Nicoll, Kathleen]的文章 |
| 必应学术 |
| 必应学术中相似的文章 |
| [Nicoll, Kathleen]的文章 |
| 相关权益政策 |
| 暂无数据 |
| 收藏/分享 |
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。
