Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/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
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ISSN | 0031-0182 |
EISSN | 1872-616X |
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. |
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