Arid
DOI10.1016/j.geomorph.2012.02.013
Late Holocene evolution of playa lakes in the central Ebro depression based on geophysical surveys and morpho-stratigraphic analysis of lacustrine terraces
Gutierrez, F.1; Valero-Garces, B.2; Desir, G.1; Gonzalez-Samperiz, P.2; Gutierrez, M.1; Linares, R.3; Zarroca, M.3; Moreno, A.2; Guerrero, J.1; Roque, C.4; Arnold, L. J.5; Demuro, M.5
通讯作者Gutierrez, F.
来源期刊GEOMORPHOLOGY
ISSN0169-555X
EISSN1872-695X
出版年2013
卷号196页码:177-197
英文摘要

The origin and morpho-stratigraphic evolution of the largest playa-lake system (La Playa-El Pueyo) in the Bujaraloz-Sastago endorheic area, located in the semiarid central sector of the Ebro Depression, are analysed. The enclosed depressions are developed on gypsiferous Tertiary bedrock and show a prevalent WNW-ESE orientation parallel to the direction of the prevalent strong local wind (Cierzo). Yardangs have been carved in bedrock and unconsolidated terrace deposits in the leeward sector of the largest lake basins. A sequence of three lacustrine terrace levels has been identified by detailed geomorphological mapping. The treads of the upper, middle and lower terrace levels. are situated at +9 m, +6 m and +0.5 m above the playa-lake floors, respectively. Seismic refraction and electrical resistivity profiles acquired in La Playa reveal a thin basin fill (similar to 2 m) with a planar base. These data allow ruling out the genetic hypothesis for the depressions involving the collapse of large bedrock cavities and support a mixed genesis of combined widespread dissolution and subsidence by groundwater discharge and eolian deflation during dry periods. The 5 m thick deposit of the middle terrace was investigated in hand-dug and backhoe trenches. Six AMS radiocarbon ages from this terrace indicate an aggradation phase between 3.9 ka and ca. 2 ka. These numerical ages yield a maximum average aggradation rate of 2.6 mm/yr and a minimum excavation rate by wind deflation of 3 mm/yr subsequent to the accumulation of the middle terrace. The latter figure compares well with those calculated in several arid regions of the world using yardangs carved in palaeolake deposits. The aggradation phase between 4 and 2 ka is coherent with other Iberian and Mediterranean records showing relatively more humid conditions after 4 ka, including the Iron Ages and the Iberian-Roman Period. (C) 2012 Elsevier B.V. All rights reserved.


英文关键词Deflation basins Palaeohydrology Trenching Geophysics Holocene Saline lakes
类型Article
语种英语
国家Spain
收录类别SCI-E
WOS记录号WOS:000322206900012
WOS关键词ENVIRONMENTAL-CHANGES ; SALADA-MEDIANA ; BASIN ; SEDIMENTS ; CLIMATE ; RECORD ; SPAIN ; EUROPE ; LUMINESCENCE ; FLUCTUATIONS
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/2XILL650/177385
作者单位1.Univ Zaragoza, Dept Ciencias Tierra, Zaragoza, Spain;
2.CSIC, IPE, Zaragoza, Spain;
3.Univ Autonoma Barcelona, Area Geodinam Externa & Hidrogeol, E-08193 Barcelona, Spain;
4.Univ Girona, Area Geodinam Externa & Geomorfol, Girona, Spain;
5.Ctr Nacl Invest Evoluc Humana CENIEH, Burgos, Spain
推荐引用方式
GB/T 7714
Gutierrez, F.,Valero-Garces, B.,Desir, G.,et al. Late Holocene evolution of playa lakes in the central Ebro depression based on geophysical surveys and morpho-stratigraphic analysis of lacustrine terraces[J],2013,196:177-197.
APA Gutierrez, F..,Valero-Garces, B..,Desir, G..,Gonzalez-Samperiz, P..,Gutierrez, M..,...&Demuro, M..(2013).Late Holocene evolution of playa lakes in the central Ebro depression based on geophysical surveys and morpho-stratigraphic analysis of lacustrine terraces.GEOMORPHOLOGY,196,177-197.
MLA Gutierrez, F.,et al."Late Holocene evolution of playa lakes in the central Ebro depression based on geophysical surveys and morpho-stratigraphic analysis of lacustrine terraces".GEOMORPHOLOGY 196(2013):177-197.
条目包含的文件
文件名称/大小 资源类型 版本类型 开放类型 使用许可
Late Holocene evolut(4865KB)期刊论文出版稿开放获取CC BY-NC-SA浏览
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
[Gutierrez, F.]的文章
[Valero-Garces, B.]的文章
[Desir, G.]的文章
百度学术
百度学术中相似的文章
[Gutierrez, F.]的文章
[Valero-Garces, B.]的文章
[Desir, G.]的文章
必应学术
必应学术中相似的文章
[Gutierrez, F.]的文章
[Valero-Garces, B.]的文章
[Desir, G.]的文章
相关权益政策
暂无数据
收藏/分享
文件名: Late Holocene evolution of playa lakes in the central Ebro depression based on geophysical surveys and morpho-stratigraphic analysis of lacustrine terraces.pdf
格式: Adobe PDF
此文件暂不支持浏览

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。