Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.quascirev.2011.03.004 |
A framework of Holocene and Late Pleistocene environmental change in eastern Iran inferred from the dating of periods of alluvial fan abandonment, river terracing, and lake deposition | |
Walker, Richard Thomas1; Fattahi, Morteza2,3 | |
通讯作者 | Walker, Richard Thomas |
来源期刊 | QUATERNARY SCIENCE REVIEWS
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ISSN | 0277-3791 |
出版年 | 2011 |
卷号 | 30期号:9-10页码:1256-1271 |
英文摘要 | We review studies of the Holocene and Late Pleistocene stratigraphy of eastern Iran to infer past changes in the environment within this presently arid region. We build a scenario of widespread, and presumably climatically driven, evolution of the landscape through the Holocene. Six sites, covering a 10 range in latitude, indicate a regional abandonment of alluvial fan surfaces at similar to 10 +/- 3 ka, with the younger (similar to 9 ka) end of this age range supported by several of the best-constrained studies. Incision of rivers into the fan surfaces has occurred in discrete stages in the early to mid-Holocene (similar to 9-7 ka) leading to the formation of flights of river terraces. Detailed records of lakebed deposition in the presently arid interior of Iran are rare, though the available data indicate lake highstand conditions at <7.8 ka at South Golbaf in SE Iran and at < 8.7 +/- 1.1 ka at the Nimbluk plain in NE Iran. The major periods of Holocene landscape development hence correlate with a period of time where water was more abundant than at present, with incision of rivers into thick alluvial deposits possibly occurring due to a combination of decreased sediment supply and high levels of precipitation, and with the formation of inset river terraces possibly responding to century-scale fluctuations in precipitation. No major geomorphic changes are identified within the later part of the Holocene, from which we infer that increased aridity has slowed evolution of the landscape. A decrease in precipitation in the mid-Holocene may have had a detrimental effect on bronze age societies in eastern Iran as has been inferred elsewhere in the eastern Mediterranean region. The pre-Holocene environmental changes in eastern Iran are less well constrained, though there are suggestions of alluvial fan abandonment at 40-60 ka, at similar to 80 ka, and at similar to 120 ka. (C) 2011 Elsevier Ltd. All rights reserved. |
英文关键词 | Iran Asia Holocene Landscape evolution Palaeoenvironment |
类型 | Article |
语种 | 英语 |
国家 | England ; Iran |
收录类别 | SCI-E |
WOS记录号 | WOS:000291516100018 |
WOS关键词 | ARABIA-EURASIA CONVERGENCE ; SABZEVAR THRUST-FAULT ; QUATERNARY SLIP-RATES ; CLIMATE-CHANGE ; NE IRAN ; MEDITERRANEAN REGION ; HYDROLOGICAL CHANGES ; LEVEL FLUCTUATIONS ; NORTHEAST IRAN ; DEAD-SEA |
WOS类目 | Geography, Physical ; Geosciences, Multidisciplinary |
WOS研究方向 | Physical Geography ; Geology |
来源机构 | University of Oxford |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/170238 |
作者单位 | 1.Univ Oxford, Dept Earth Sci, Oxford OX1 3AN, England; 2.Univ Tehran, Inst Geophys, Tehran, Iran; 3.Univ Oxford, Ctr Environm, Oxford OX1 3QY, England |
推荐引用方式 GB/T 7714 | Walker, Richard Thomas,Fattahi, Morteza. A framework of Holocene and Late Pleistocene environmental change in eastern Iran inferred from the dating of periods of alluvial fan abandonment, river terracing, and lake deposition[J]. University of Oxford,2011,30(9-10):1256-1271. |
APA | Walker, Richard Thomas,&Fattahi, Morteza.(2011).A framework of Holocene and Late Pleistocene environmental change in eastern Iran inferred from the dating of periods of alluvial fan abandonment, river terracing, and lake deposition.QUATERNARY SCIENCE REVIEWS,30(9-10),1256-1271. |
MLA | Walker, Richard Thomas,et al."A framework of Holocene and Late Pleistocene environmental change in eastern Iran inferred from the dating of periods of alluvial fan abandonment, river terracing, and lake deposition".QUATERNARY SCIENCE REVIEWS 30.9-10(2011):1256-1271. |
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