干旱区生态环境知识资源中心(Arid): Lake Ivanpah: An overlooked pluvial lake in the southern Great Basin, U. S. A.

Arid

DOI	10.1016/j.quascirev.2020.106792
	Lake Ivanpah: An overlooked pluvial lake in the southern Great Basin, U. S. A.
	Spaulding, W. Geoffrey; Sims, Douglas B.; Harvey, Korey T.
通讯作者	Spaulding, WG (corresponding author), PaleoWest, 2320 Cordelia St, Henderson, NV 89044 USA.
来源期刊	QUATERNARY SCIENCE REVIEWS
ISSN	0277-3791
EISSN	1873-457X
出版年	2021
卷号	254
英文摘要	A long-held but untested hydroclimatic model maintains that, in the arid southern Great Basin, U.S.A., hydrographically isolated watersheds held no late Quaternary paleolakes, even during pluvial periods. We test this model at Ivanpah Dry Lake, which has a watershed lying wholly within the mountains of the Mojave Desert, and no obvious ancient shorelines. Remote imagery was used to identify relict geomorphic features attributable to wave action during high-lake stands, and excavations in different parts of the basin margin revealed beach and lacustrine sedimentary sequences, some truncated by relict playa surfaces, most >2.5 m above the current playa. In the southern Ivanpah basin exposed lacustrine sediment grades upward to near-shore muds, capped by alluvium of the Cima Wash Delta-Fan. Time-dependent changes in carbon isotope ratios indicate that saltscrub (Atriplex polycarpa), the desert vegetation surrounding the dry lake today, did not become dominant until after 5.4 cal ka. A comparison of Paleolake Ivanpah's initial radiocarbon chronology to regional hydroclimatic proxies demonstrates its potential to inform on changing sources of moisture contributing to pluvial events. This study shows not only that pluvial lakes occurred in the isolated watersheds of the Mojave Desert, but also that the margins of these basins are so geomorphically active as to entirely obscure the evidence of their occurrence. However, this process often buries and protects, rather than obliterates, geomorphic and stratigraphic evidence for past high-lake stands. It also shows that the basin margin, and not its depo-center, is where evidence of pluvial lakes should be sought. In the Ivanpah basin, some Holocene paleolakes appear to have persisted for decades to centuries. (C) 2021 Elsevier Ltd. All rights reserved.
英文关键词	Pluvial lakes Dry lakes Quaternary paleohydrology Paleoclimatology Arid-lands geomorphology Climate change
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000616643800006
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/2XILL650/348119
作者单位	[Spaulding, W. Geoffrey] PaleoWest, 2320 Cordelia St, Henderson, NV 89044 USA; [Sims, Douglas B.] Coll Southern Nevada, Sch Sci & Math, 700 Coll Dr,HNC217, Henderson, NV 89002 USA; [Harvey, Korey T.] 1911 LaSalle St St, Louis, MO 63014 USA
推荐引用方式 GB/T 7714	Spaulding, W. Geoffrey,Sims, Douglas B.,Harvey, Korey T.. Lake Ivanpah: An overlooked pluvial lake in the southern Great Basin, U. S. A.[J],2021,254.
APA	Spaulding, W. Geoffrey,Sims, Douglas B.,&Harvey, Korey T..(2021).Lake Ivanpah: An overlooked pluvial lake in the southern Great Basin, U. S. A..QUATERNARY SCIENCE REVIEWS,254.
MLA	Spaulding, W. Geoffrey,et al."Lake Ivanpah: An overlooked pluvial lake in the southern Great Basin, U. S. A.".QUATERNARY SCIENCE REVIEWS 254(2021).