Arid
DOI10.1016/j.quaint.2014.10.015
Impacts of climate change on the formation and stability of late Quaternary sand sheets and falling dunes, Black Mesa region, southern Colorado Plateau, USA
Ellwein, Amy L.1; Mahan, Shannon A.2; McFadden, Leslie D.1
通讯作者Ellwein, Amy L.
来源期刊QUATERNARY INTERNATIONAL
ISSN1040-6182
EISSN1873-4553
出版年2015
卷号362页码:87-107
英文摘要

Detailed geomorphic mapping and analysis of soil-stratigraphy and optically stimulated luminescence (OSL) dating of eolian sand dunes on Black Mesa, Arizona, reveal eolian sediment deposition occurred from 30 to 16 ka, followed by a period of widespread dune stabilization from 12 to 8 ka. Localized reactivation of the previously stabilized dune forms or local changes in sediment supply have occurred in the middle to late Holocene in this region. Cooler, wetter, and more variable climatic conditions during MIS 3 and 2 led to increased channel and floodplain sediment supply. Eolian sediment derived from these sources was transported up to 60 km. Deposition of this material has reduced regional topographic roughness by filling tributary canyon ’traps’ oriented perpendicular to the dominant wind and sediment transport direction. Topographically controlled falling dunes and sand ramps in this region are preserved because of their geomorphic position and provide evidence of the paleoenvironmental state of the fluvial and eolian systems before, during, and immediately after the last glacial maximum on the southern Colorado Plateau.


Widely used predictive models of eolian system dynamics are typically based entirely on climatic variables and do not account for landscape complexity and geomorphic history. Climate-only assumptions fail to give accurate predictions of the dynamics of this and many other dune fields. A growing body of work suggests that eolian deposits in wind-driven semiarid climates may be more strongly related to increases in sediment supply than to increases in aridity. (C) 2014 Elsevier Ltd and INQUA. All rights reserved.


英文关键词Climate change Eolian Soil stratigraphy Falling dunes Linear dunes OSL geochronology
类型Article
语种英语
国家USA
收录类别SCI-E
WOS记录号WOS:000350998100011
WOS关键词SOUTHWESTERN UNITED-STATES ; NORTHERN NEW-MEXICO ; LATE PLEISTOCENE ; MOJAVE DESERT ; GREAT-PLAINS ; EOLIAN SAND ; HOLOCENE ; LUMINESCENCE ; VEGETATION ; HISTORY
WOS类目Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向Physical Geography ; Geology
来源机构United States Geological Survey
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/189991
作者单位1.Univ New Mexico, Dept Earth & Planetary Sci, Albuquerque, NM 87131 USA;
2.US Geol Survey, Denver Fed Ctr, Denver, CO 80225 USA
推荐引用方式
GB/T 7714
Ellwein, Amy L.,Mahan, Shannon A.,McFadden, Leslie D.. Impacts of climate change on the formation and stability of late Quaternary sand sheets and falling dunes, Black Mesa region, southern Colorado Plateau, USA[J]. United States Geological Survey,2015,362:87-107.
APA Ellwein, Amy L.,Mahan, Shannon A.,&McFadden, Leslie D..(2015).Impacts of climate change on the formation and stability of late Quaternary sand sheets and falling dunes, Black Mesa region, southern Colorado Plateau, USA.QUATERNARY INTERNATIONAL,362,87-107.
MLA Ellwein, Amy L.,et al."Impacts of climate change on the formation and stability of late Quaternary sand sheets and falling dunes, Black Mesa region, southern Colorado Plateau, USA".QUATERNARY INTERNATIONAL 362(2015):87-107.
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