气候变化领域集成服务门户(CCPortal): Late Neogene-Quaternary tephrochronology, stratigraphy, and paleoclimate of Death Valley, California, USA

CCPortal

DOI	10.1130/B31690.1
	Late Neogene-Quaternary tephrochronology, stratigraphy, and paleoclimate of Death Valley, California, USA
	Knott J.R.; Machette M.N.; Wan E.; Klinger R.E.; Liddicoat J.C.; Sarna-Wojcicki A.M.; Fleck R.J.; Deino A.L.; Geissman J.W.; Slate J.L.; Wahl D.B.; Wernicke B.P.; Wells S.G.; Tinsley J.C.; III; Hathaway J.C.; Weamer V.M.
发表日期	2018
ISSN	167606
起始页码	1231
结束页码	1255
卷号	130 期号:2021-07-08
英文摘要	Sedimentary deposits in midlatitude continental basins often preserve a paleoclimate record complementary to marine-based records. However, deriving that paleoclimate record depends on having well-exposed deposits and establishing a sufficiently robust geochronology. After decades of research, we have been able to correlate 77 tephra beds exposed in multiple stratigraphic sections in the Death Valley area, California, United States. These correlations identify 25 different tephra beds that erupted from at least five different volcanic centers from older than 3.58 Ma to ca. 32 ka. We have informally named and determined the ages for seven previously unrecognized beds: ca. 3.54 Ma tuff of Curry canyon, ca. 3.45 Ma tuff of Fur- nace Creek, ca. 3.1 Ma tuff of Kit Fox Hills, ca. 3.1 Ma tuff of Mesquite Flat, ca. 3.15 Ma tuff of Texas Spring, 3.117 ± 0.011 Ma tuff of Echo Canyon, and the ca. 1.3 Ma Amargosa ash bed. Several of these tephra beds are found as far northeast as central Utah and could be important marker beds in western North America. Our tephrochronologic data, combined with magnetic polarity data and 40Ar/39Ar age determinations, redefine Neogene sedimentary deposits exposed across 175 km2 of the Death Valley area. The alluvial/lacustrine Furnace Creek Formation is a time-transgressive sedimentary sequence ranging from ca. 6.0 to 2.5 Ma in age. The ca. 2.5-1.7 Ma Funeral Formation is typically exposed as a proximal alluvial-fan facies overlying the Furnace Creek Formation. We have correlated deposits in the Kit Fox Hills, Salt Creek, Nova Basin, and southern Death Valley with the informally named ca. 1.3-0.5 Ma Mormon Point formation. In addition, our correlation of the late Pleistocene Wilson Creek ash bed 15 in the Lake Rogers deposits represents the first unambiguous sequences deposited during the Last Glacial Maximum (marine isotope stage [MIS] 2) in Death Valley. Based on this new stratigraphic framework, we show that the Pliocene and Pleistocene climate in Death Valley is consistent with the well-established marine tropical/ subtropical record. Pluvial lakes in Death Valley and Searles Valley began to form ca. 3.5-3.4 Ma in the late Pliocene during MIS MG5. Initiation of lakes in these two hydrologically separated valleys at the same time at the beginning of a cooling trend in the marine climate record suggests a link to a cooler, wetter (glacial) regional climate in North America. The Death Valley lake persisted until ca. 3.30 Ma, at the peak of the M2 glaciation, after which there is no evidence of Pliocene lacustrine deposition, even at the peak of the Northern Hemisphere Glaciation (ca. 2.75 Ma). If pluvial lakes in the Pliocene are an indirect record of glacial climate conditions, as they are for the Pleistocene, then a glacial climate was present in western North America for ~200,000 yr during the Pliocene, encompassing MIS MG5-M2. Pleistocene pluvial lakes in Death Valley that formed ca. 1.98-1.78 Ma, 1.3-1.0 Ma, and ca. 0.6 Ma (MIS 16) are consistent with other regional climate records that indicate a regional glacial climate; however, Death Valley was relatively dry at ca. 0.77 Ma (MIS 19), when large lakes existed in other basins. The limited extent of the MIS 2 marsh/shallow lake in the Lake Rogers basin of northern Death Valley reflects the well-known regional glacial climate at that time; however, Death Valley received relatively lower inflow and rainfall in comparison. © 2018 The Authors.
语种	英语
来源期刊	Bulletin of the Geological Society of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/185005
作者单位	Department of Geological Sciences, California State University-Fullerton, Fullerton, CA 92834, United States; U.S. Geological Survey, Box 25046, Denver, CO 80225-0046, United States; U.S. Geological Survey, 345 Middlefield Road, MS 975, Menlo Park, CA 94025, United States; Technical Service Center, U.S. Bureau of Reclamation, P.O. Box 25007, D-8530, Denver, CO 80225-0007, United States; Department of Environmental Science, Barnard College, Columbia University, 3009 Broadway, New York, NY 10027-6598, United States; Berkeley Geochronology Center, 2455 Ridge Road, Berkeley, CA 94709, United States; Department of Earth and Planetary Sciences, University of New Mexico, MSC 03 2040, Albuquerque, NM 87001, United States; Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125, United States; Desert Research Institute, 2215 Raggio Parkway, Reno, NV 89512, United States; Paleo Seis Surveys, LLC, 120 Fairbreeze Drive, Port Townsend, WA 98368, United States; De...
推荐引用方式 GB/T 7714	Knott J.R.,Machette M.N.,Wan E.,et al. Late Neogene-Quaternary tephrochronology, stratigraphy, and paleoclimate of Death Valley, California, USA[J],2018,130(2021-07-08).
APA	Knott J.R..,Machette M.N..,Wan E..,Klinger R.E..,Liddicoat J.C..,...&Weamer V.M..(2018).Late Neogene-Quaternary tephrochronology, stratigraphy, and paleoclimate of Death Valley, California, USA.Bulletin of the Geological Society of America,130(2021-07-08).
MLA	Knott J.R.,et al."Late Neogene-Quaternary tephrochronology, stratigraphy, and paleoclimate of Death Valley, California, USA".Bulletin of the Geological Society of America 130.2021-07-08(2018).