Quaternary Research

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Downward Migration of Coastal Conifers as a Response to Recent Land Emergence in Eastern Hudson Bay, Québec
Quaternary Research - Tập 40 - Trang 81-88 - 1993
Yves Bégin, Dominique Bérubé, Martin Grégoire
AbstractPostglacial uplift in the eastern Hudson Bay area is among the most rapid in the world (300 m during the last 8000 yr). Although emergence curves based on 14 C-dated raised shorelines give a consistent basis for modeling relative sea-level changes, such a low-resolution dating method is inappropriate for estimating trends over recent de...... hiện toàn bộ
The postglacial history of three Picea species in New England, USA
Quaternary Research - Tập 59 - Trang 61-69 - 2003
Matts Lindbladh, George L Jacobson, Molly Schauffler
AbstractGiven the difficulty of separating the three Picea species—P. glauca, P. mariana, and P. rubens (white, black, and red spruce)—in the pollen record, little is known about their unique histories in eastern North America following deglaciation. Here we report the first use of a c...... hiện toàn bộ
Holocene Paleoclimates of India
Quaternary Research - Tập 66 - Trang 442-453 - 2006
Sushma Prasad, Yehouda Enzel
AbstractWe present a comprehensive summary of the available palaeoclimate records from India and compare the results from different proxies. The results indicate (i) fluctuating lake levels during the early Holocene. The period of relatively higher lake levels from increased precipitation efficiency was reached only ∼7.2–6.0 cal kyr BP, possibly due to increased co...... hiện toàn bộ
A Record of Holocene Climate Change from Lake Geochemical Analyses in Southeastern Arabia
Quaternary Research - Tập 66 Số 3 - Trang 465-476 - 2006
Adrian G. Parker, Andrew Goudie, Stephen Stokes, Kevin White, Martin J. Hodson, Michelle Manning, Derek Kennet
AbstractLacustrine sediments from southeastern Arabia reveal variations in lake level corresponding to changes in the strength and duration of Indian Ocean Monsoon (IOM) summer rainfall and winter cyclonic rainfall. The late glacial/Holocene transition of the region was characterised by the development of mega-linear dunes. These dunes became stabilised and vegetat...... hiện toàn bộ
Mid-Holocene climate change and its effect on prehistoric cultural evolution in eastern Qinghai Province, China
Quaternary Research - Tập 77 - Trang 23-30 - 2012
Guanghui Dong, Xin Jia, Chengbang An, Fahu Chen, Yan Zhao, Shichen Tao, Minmin Ma
We studied the mid-Holocene climate change in eastern Qinghai Province, China and its impact on the evolution of Majiayao (3980–2050 BC) and Qijia (2183–1635 BC) cultures, near the important Neolithic site of Changning. The investigation focused on analyses of grain size, magnetic susceptibility, ratios of elemental contents, and pollen assemblage from a loess-paleosol sequence. The result...... hiện toàn bộ
Charophyte remains from Wadi Howar as evidence for deep mid-Holocene freshwater lakes in the eastern Sahara of Northwest Sudan
Quaternary Research - Tập 36 Số 2 - Trang 210-223 - 1991
Stefan Kröpelin, Ingeborg Soulié‐Märsche
AbstractField research in the eastern Sahara (Northwest Sudan) revealed extensive early- to mid-Holocene lake marl deposits bearing gyrogonites of Charophytes (green algae, stoneworts) along the lower course of the Wadi Howar, an extinct tributary to the Nile. The Charophyte flora of a paleolake southwest of Jebel Rahib (17°31′N/26°52′E) dated prior to 4720 ± 110 y...... hiện toàn bộ
Ancient pine forest on inland dunes in the Spanish northern meseta
Quaternary Research - Tập 63 - Trang 1-14 - 2005
Fátima Franco-Múgica, Mercedes García-Antón, Javier Maldonado-Ruiz, Carlos Morla-Juaristi, Helios Sainz-Ollero
We present a new stratigraphic (pollen and nonpollen microfossils and charcoal particle) sequence with five AMS dates, covering about the last 9000 yr, of a core collected from the Spanish northern meseta, one of the territories of the Iberian Peninsula for which little paleobotanical information is available. The results support the hypothesis of the permanence of the pine forests, in mor...... hiện toàn bộ
Influence of a glacial buzzsaw on the height and morphology of the Cascade Range in central Washington State, USA
Quaternary Research - Tập 65 - Trang 96-107 - 2006
Sara Gran Mitchell, David R. Montgomery
AbstractAnalysis of climatic and topographic evidence from the Cascade Range of Washington State indicates that glacial erosion limits the height and controls the morphology of this range. Glacial erosion linked to long-term spatial gradients in the ELA created a tilted, planar zone of 373 cirques across the central part of the range; peaks and ridges now rise ≤600...... hiện toàn bộ
Changes in the glacier extent and surface elevation along the Ningchan and Shuiguan river source, eastern Qilian Mountains, China
Quaternary Research - Tập 81 - Trang 531-537 - 2014
Bo Cao, Baotian Pan, Jie Wang, Donghui Shangguan, Zhenling Wen, Wentao Qi, Hang Cui, Yaoyang Lu
AbstractWe investigate the changes at nine glaciers in the Ningchan and Shuiguan river source, eastern Qilian Mountains, between 1972 and 2010. According to analysis of topographic maps and multispectral satellite data, all nine glaciers in the study area have retreated, by a maximum of 250 ± 57.4 m and a minimum of 91 ± 57.4 m. The total glacier area decreased by ...... hiện toàn bộ
Sea-Level Estimates during the Last Deglaciation Based on δ18O and Accelerator Mass Spectrometry 14C Ages Measured in Globigerina bulloides
Quaternary Research - Tập 31 - Trang 381-391 - 1989
Edouard Bard, Richard Fairbanks, Maurice Arnold, Pierre Maurice, Josette Duprat, Jean Moyes, Jean-Claude Duplessy
AbstractCoupled measurements of δ18O and accelerator mass spectrometry (AMS) 14C in a particular species of planktonic foraminifera may be used to calculate sea-level estimates for the last deglaciation. Of critical importance for this type of study is a knowledge of the seasonality of foraminiferal growth, which can be pro...... hiện toàn bộ
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