DOI: 10.1016/j.quascirev.2017.05.022
Scopus记录号: 2-s2.0-85020701816
论文题名: Postglacial relative sea-level changes in northwest Iceland: Evidence from isolation basins, coastal lowlands and raised shorelines
作者: Brader M.D. ; Lloyd J.M. ; Barlow N.L.M. ; Norðdahl H. ; Bentley M.J. ; Newton A.J.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2017
卷: 169 起始页码: 114
结束页码: 130
语种: 英语
英文关键词: Diatoms
; Europe
; Holocene
; Iceland
; Isolation basin
; Micropalaeontology
; Sea level changes
Scopus关键词: Glacial geology
; Ice
; Sea level
; Tectonics
; Unloading
; Diatoms
; Europe
; Holocenes
; Icelands
; Isolation basin
; Micropalaeontology
; Sealevel change
; Loading
; coastal zone
; diatom
; Holocene
; lowland environment
; meltwater
; microfossil
; paleontology
; Postglacial
; reconstruction
; sea level change
; uplift
; Atlantic Ocean
; Atlantic Ocean (North)
; Iceland
; Bacillariophyta
英文摘要: Relative sea-level (RSL) data provide constraints on land uplift associated with former ice loading and can be used to differentiate between contrasting ice unloading scenarios. Isolation basin, coastal lowland and geomorphological evidence is employed to reconstruct RSL changes in northwest (NW) Iceland, which may have experienced contrasting uplift patterns. Under local (NW) uplift, highest RSL would be expected in central Vestfirðir, whereas highest RSL would be closest to the main ice-loading centre under regional (central Iceland) uplift. Four new RSL records are presented based on 16 sea-level index points and 4 limiting ages from sites principally focussed along a transect away from central Iceland. The new RSL records highlight spatial variability of Holocene RSL changes and provide constraints on deglaciation. There is an increase in marine limit elevation with proximity to the proposed principal ice loading centre in central Iceland. Highest recorded marine limit shorelines are found in Hrútafjörður-Heggstaðanes (southeast), the lowest in Hlöðuvík and Rekavík bak Látrum (north), and at an intermediate elevation in Reykjanes-Laugardalur (central Vestfirðir). Evidence from Breiðavik-Látrar records early rapid deglaciation in Breiðafjörður or a complex interplay of multiple uplift centres. RSL fell rapidly following deglaciation in several locations as a result of the quick response of the Icelandic lithosphere to unloading. The RSL data along the transect show an uplift pattern consistent with extensive regional glaciation emanating from central Iceland, which could have implications for ice sheet configuration and patterns of deglaciation, glacio-isostatic adjustment modelling and the volume of meltwater input into the North Atlantic. © 2017 The Authors Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59165
Appears in Collections: 过去全球变化的重建
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作者单位: Department of Geography, Durham University, Lower Mountjoy, South Road, Durham, United Kingdom; School of Earth and Environment, University of Leeds, Leeds, United Kingdom; School of Engineering and Natural Sciences, Faculty of Earth Sciences, University of Iceland, Reykjavik, Iceland; Institute of Geography, School of GeoSciences, University of Edinburgh, Drummond Street, Edinburgh, United Kingdom
Recommended Citation:
Brader M.D.,Lloyd J.M.,Barlow N.L.M.,et al. Postglacial relative sea-level changes in northwest Iceland: Evidence from isolation basins, coastal lowlands and raised shorelines[J]. Quaternary Science Reviews,2017-01-01,169