气候变化领域集成服务门户(CCPortal): Formation of Box Canyon, Idaho, by megaflood: Implications for seepage erosion on earth and mars

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DOI	10.1126/science.1156630
	Formation of Box Canyon, Idaho, by megaflood: Implications for seepage erosion on earth and mars
	Lamb M.P.; Dietrich W.E.; Aciego S.M.; DePaolo D.J.; Manga M.
发表日期	2008
ISSN	0036-8075
起始页码	1067
结束页码	1070
卷号	320 期号:5879
英文摘要	Amphitheater-headed canyons have been used as diagnostic indicators of erosion by groundwater seepage, which has important implications for landscape evolution on Earth and astrobiology on Mars. Of perhaps any canyon studied, Box Canyon, Idaho, most strongly meets the proposed morphologic criteria for groundwater sapping because it is incised into a basaltic plain with no drainage network upstream, and approximately 10 cubic meters per second of seepage emanates from its vertical headwall. However, sediment transport constraints, 4He and 14C dates, plunge pools, and scoured rock indicate that a megaflood (greater than 220 cubic meters per second) carved the canyon about 45,000 years ago. These results add to a growing recognition of Quaternary catastrophic flooding in the American northwest, and may imply that similar features on Mars also formed by floods rather than seepage erosion.
英文关键词	carbon 14; ground water; helium; water; basalt; canyon; Earth; erosion; flooding; landscape evolution; Mars; sediment transport; seepage; article; astronomy; flooding; geomorphology; landscape; priority journal; Quaternary (period); sediment; soil erosion; United States; disaster; geography; sediment; time; Box Canyon; Colorado; Idaho; North America; United States; Geography; Geologic Sediments; Idaho; Mars; Natural Disasters; Time; Water
语种	英语
来源期刊	Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/244440
作者单位	Department of Earth and Planetary Science, University of California, Berkeley, CA 94720-4768, United States
推荐引用方式 GB/T 7714	Lamb M.P.,Dietrich W.E.,Aciego S.M.,et al. Formation of Box Canyon, Idaho, by megaflood: Implications for seepage erosion on earth and mars[J],2008,320(5879).
APA	Lamb M.P.,Dietrich W.E.,Aciego S.M.,DePaolo D.J.,&Manga M..(2008).Formation of Box Canyon, Idaho, by megaflood: Implications for seepage erosion on earth and mars.Science,320(5879).
MLA	Lamb M.P.,et al."Formation of Box Canyon, Idaho, by megaflood: Implications for seepage erosion on earth and mars".Science 320.5879(2008).