globalchange  > 过去全球变化的重建
DOI: 10.1016/j.palaeo.2016.08.042
论文题名:
A loess record of pre-Late Wisconsin glacial outburst flooding, Pleistocene paleoenvironment, and Irvingtonian fauna from the Rulo site, southeastern Washington, USA
作者: Bader N.E.; Spencer P.K.; Bailey A.S.; Gastineau K.M.; Tinkler E.R.; Pluhar C.J.; Bjornstad B.N.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2016
卷: 462
起始页码: 57
结束页码: 69
语种: 英语
英文关键词: Fossils ; Loess ; Missoula floods ; Paleosols ; Palouse ; Vertebrates
英文摘要: Worldwide, loess-paleosol sequences are archives of terrestrial Quaternary paleoenvironment data. The Rulo site is a newly described site in the Palouse loess of southeastern Washington State, USA. The site reveals a 19 m thick deposit of loess and flood sediment, preserving a total of 30 m of reconstructed stratigraphic section. Five unconformity-bound sequences of sediment are exposed at the site, the lowest two of which have yielded fossil remains, including the first reported occurrence of flat-headed peccary (Platygonus compressus) in northwestern North America. The unconformities, two diamicts bearing extrabasinal clasts, and a number of clastic dikes provide evidence for pre-Wisconsin glacial outburst floods in southeastern Washington. More than a dozen paleosols are preserved at the site. These soils are relatively unweathered and therefore primarily record periods of slow sedimentation accumulation in the Palouse, rather than changes in weathering rates. A paleosol near the base of the sequence is unusually weathered for Palouse paleosols, and records a period of increased weathering during the Middle Pleistocene. All units above the sand are normal paleomagnetic polarity; additional age control is provided by a tephra in the upper third of the sequence that matches a ca. 220 ka tephra from Newberry Volcano, and by stratigraphic correlation of later units to other sites in the Palouse. The Rulo site adds to the record of Irvingtonian fauna in North America, and supports accumulating evidence for pre-Late Wisconsin glacial outburst floods in the Pacific Northwest. © 2016 Elsevier B.V.
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/68212
Appears in Collections:过去全球变化的重建

Files in This Item:

There are no files associated with this item.


作者单位: Department of Geology, Whitman College, 345 Boyer Ave., Walla Walla, WA, United States; Department of Earth & Environmental Sciences, California State University Fresno, 2576 E San Ramon Ave., Fresno, CA, United States; 1918 Harris Ave., Richland, WA, United States

Recommended Citation:
Bader N.E.,Spencer P.K.,Bailey A.S.,et al. A loess record of pre-Late Wisconsin glacial outburst flooding, Pleistocene paleoenvironment, and Irvingtonian fauna from the Rulo site, southeastern Washington, USA[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2016-01-01,462
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Bader N.E.]'s Articles
[Spencer P.K.]'s Articles
[Bailey A.S.]'s Articles
百度学术
Similar articles in Baidu Scholar
[Bader N.E.]'s Articles
[Spencer P.K.]'s Articles
[Bailey A.S.]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Bader N.E.]‘s Articles
[Spencer P.K.]‘s Articles
[Bailey A.S.]‘s Articles
Related Copyright Policies
Null
收藏/分享
所有评论 (0)
暂无评论
 

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.