干旱区生态环境知识资源中心(Arid): A sedimentological record of fluvial-aeolian interactions and climate variability in the hyperarid northern Namib Desert, Namibia

Arid

DOI	10.25131/sajg.124.0008
	A sedimentological record of fluvial-aeolian interactions and climate variability in the hyperarid northern Namib Desert, Namibia
	Miller, R. McG.; Krapf, C.; Hoey, T.; Fitchett, J.; Nguno, A-k.; Muyambas, R.; Ndeutepo, A.; Medialdea, A.; Whitehead, A.; Stengel, I.
通讯作者	Miller, RM (corresponding author), POB 11222, Windhoek, Namibia.
来源期刊	SOUTH AFRICAN JOURNAL OF GEOLOGY
ISSN	1012-0750
EISSN	1996-8590
出版年	2021
卷号	124 期号:3 页码:575-610
英文摘要	The aeolian regime of the 100 km wide, hyperarid Namib Desert has been sporadically punctuated by the deposition of fluvial sediments generated during periods of higher humidity either further inland or well within the desert from Late Oligocene to Late Holocene. Four new Late Cenozoic formations are described from the northern Skeleton Coast and compared with formations further south: the Klein Nadas, Nadas (gravels, sands), Vulture's Nest (silts) and Uniab Boulder Formations. The Klein Nadas Formation is a trimodal mass-flow fan consisting of thousands of huge, remobilised, end-Carboniferous Dwyka glacial boulders, many >3 m in length, set in an abundant, K-feldspar-rich and sandy matrix of fine gravel. Deluge rains over the smallest catchments deep within the northern Namib were the driving agent for the Klein Nadas Fan, the termination of which, with its contained boulders, rests on the coastal salt pans. These rains also resulted in catastrophic mass flows in several of the other northern Namib rivers. The Uniab Boulder Formation, being one, consists only of huge free-standing boulders. Gravelly fluvial deposition took place during global interglacial and glacial events. The Skeleton Coast Erg and other smaller dune trains blocked the rivers at times. The low-energy, thinly bedded silt deposits of the central and northern Namib are quite distinctive from the sands and gravels of older deposits. Their intermittent deposition is illustrated by bioturbation and pedogenesis of individual layers. Published offshore proxy climatological data (pollens, upwelling, wind, sea surface temperatures) point to expansion of the winter-rainfall regime of the southern Cape into southwestern Angola during strong glacial periods between the Upper Pleistocene and Holocene. In contrast to deposition initiated by short summer thunder storms, we contend that the silt successions are river-end accumulations within which each layer was deposited by runoff from comparatively gentle winter rains that lasted several days.
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000696701300002
WOS关键词	CONTINENTAL FLOOD VOLCANISM ; SKELETON COAST ERG ; SOUTHERN-AFRICA ; LATE-QUATERNARY ; TSONDAB SANDSTONE ; ORANGE RIVER ; KUISEB RIVER ; DEPOSITIONAL ENVIRONMENT ; SOUTHWESTERN AFRICA ; LATE PLEISTOCENE
WOS类目	Geology
WOS研究方向	Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/364723
作者单位	[Miller, R. McG.] POB 11222, Windhoek, Namibia; [Krapf, C.] Geol Survey South Australia, GPO Box 320, Adelaide, SA 5001, Australia; [Hoey, T.] Brunel Univ London, Dept Civil & Environm Engn, Uxbridge UB8 3PH, Middx, England; [Fitchett, J.] Univ Witwatersrand, Sch Geog Archaeol & Environm Studies, Johannesburg, South Africa; [Nguno, A-k.; Muyambas, R.; Ndeutepo, A.] Minist Mines & Energy, Geol Survey Namibia, Private Bag 13297, Windhoek, Namibia; [Medialdea, A.] Univ Cologne, Inst Geog, Otto Fischer Str 4, D-50674 Cologne, Germany; [Medialdea, A.] Natl Res Ctr Human Evolut CENIEH, Paseo Sierra Atapuerca 3, Burgos 09002, Spain; [Whitehead, A.] Univ Cologne, Inst Geol & Mineral, Zulpicher Str 49a, D-50674 Cologne, Germany; [Stengel, I.] NamibGeoVista, Geoconsult & Imagery, POB 80849, Windhoek, Namibia
推荐引用方式 GB/T 7714	Miller, R. McG.,Krapf, C.,Hoey, T.,et al. A sedimentological record of fluvial-aeolian interactions and climate variability in the hyperarid northern Namib Desert, Namibia[J],2021,124(3):575-610.
APA	Miller, R. McG..,Krapf, C..,Hoey, T..,Fitchett, J..,Nguno, A-k..,...&Stengel, I..(2021).A sedimentological record of fluvial-aeolian interactions and climate variability in the hyperarid northern Namib Desert, Namibia.SOUTH AFRICAN JOURNAL OF GEOLOGY,124(3),575-610.
MLA	Miller, R. McG.,et al."A sedimentological record of fluvial-aeolian interactions and climate variability in the hyperarid northern Namib Desert, Namibia".SOUTH AFRICAN JOURNAL OF GEOLOGY 124.3(2021):575-610.