Arid
DOI10.1016/j.palaeo.2014.03.031
Estuarine foraminifera record Holocene stratigraphic changes and Holocene climate changes in ENSO and the North American monsoon: Baffin Bay, Texas
Buzas-Stephens, Pamela1; Livsey, Daniel N.2; Simms, Alexander R.2; Buzas, Martin A.3
通讯作者Buzas-Stephens, Pamela
来源期刊PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
ISSN0031-0182
EISSN1872-616X
出版年2014
卷号404页码:44-56
英文摘要

During the last Quaternary sea level fall (120- ka), Baffin Bay was formed by the down-cutting of the Los Olmos, San Fernando, and Petronila Creeks of south Texas. When sea level rose, this incised valley was then filled with mixed siliciclastic/carbonate sediments that record coastal environmental change over the past 10 Icy. Previous sedimentological and seismic analysis shows that Baffin Bay contains atypical depositional environments as a result of its semi-arid climate setting and isolation from the Gulf of Mexico. Three prominent stratigraphic surfaces can be recognized within the bay deposits, and are chronostratigraphically constrained using radiocarbon dates. The purpose of the present study is to use foraminifera to create a separate account of change and to determine if foraminiferal data corroborate sedimentological evidence for sea level and climate fluctuations. Foraminifera were sampled at 20 cm intervals from a 14.4 m dated core and from surface and subsurface sediments of five cores along a dip transect. Multiple discriminate analysis was used to compare sections of the core by species proportions, and clearly delineates three different foraminiferal communities: deltaic, open-bay, and hypersaline. Breaks between these communities coincide with two of the surfaces observed in the core, one at about 8.0 Icy and the other around 5.5 ky. Rapid sea level rise at the 8.0 ky flooding surface corresponds with a shift from a deltaic to an open-bay foraminiferal assemblage, while faunal change across the 5.5 ky surface is due to the formation of a large barrier island (Padre Island) and the onset of more arid climate conditions. Prior to the isolation of Baffin Bay at 55 Icy, foraminiferal assemblages do not correspond to climate change records, perhaps because open circulation with the Gulf of Mexico tempered regional climate effects on bay salinity. After 5.5 ky, changes in foraminiferal assemblages correspond to independently derived records of the El Niflo-Southern Oscillation and North American monsoon. Foraminiferal analysis supports sedimentological interpretations in that assemblages and sediments track climate change. (C) 2014 Elsevier B.V. All rights reserved.


英文关键词Holocene climate change Foraminifera El Nino-Southern Oscillation North American monsoon Baffin Bay,Texas
类型Article
语种英语
国家USA
收录类别SCI-E
WOS记录号WOS:000336354200005
WOS关键词SEA-LEVEL ; EL-NINO ; LATE QUATERNARY ; VARIABILITY ; LAKE ; OSCILLATION ; AGE ; USA ; UK
WOS类目Geography, Physical ; Geosciences, Multidisciplinary ; Paleontology
WOS研究方向Physical Geography ; Geology ; Paleontology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/184097
作者单位1.Midwestern State Univ, Dept Geosci, Wichita Falls, TX 76308 USA;
2.Univ Calif Santa Barbara, Dept Earth Sci, Santa Barbara, CA 93106 USA;
3.Smithsonian Inst, Dept Paleobiol, Washington, DC 20560 USA
推荐引用方式
GB/T 7714
Buzas-Stephens, Pamela,Livsey, Daniel N.,Simms, Alexander R.,et al. Estuarine foraminifera record Holocene stratigraphic changes and Holocene climate changes in ENSO and the North American monsoon: Baffin Bay, Texas[J],2014,404:44-56.
APA Buzas-Stephens, Pamela,Livsey, Daniel N.,Simms, Alexander R.,&Buzas, Martin A..(2014).Estuarine foraminifera record Holocene stratigraphic changes and Holocene climate changes in ENSO and the North American monsoon: Baffin Bay, Texas.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,404,44-56.
MLA Buzas-Stephens, Pamela,et al."Estuarine foraminifera record Holocene stratigraphic changes and Holocene climate changes in ENSO and the North American monsoon: Baffin Bay, Texas".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 404(2014):44-56.
条目包含的文件
条目无相关文件。
个性服务
推荐该条目
保存到收藏夹
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Buzas-Stephens, Pamela]的文章
[Livsey, Daniel N.]的文章
[Simms, Alexander R.]的文章
百度学术
百度学术中相似的文章
[Buzas-Stephens, Pamela]的文章
[Livsey, Daniel N.]的文章
[Simms, Alexander R.]的文章
必应学术
必应学术中相似的文章
[Buzas-Stephens, Pamela]的文章
[Livsey, Daniel N.]的文章
[Simms, Alexander R.]的文章
相关权益政策
暂无数据
收藏/分享

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。