DOI: 10.1016/j.quascirev.2016.04.006
Scopus记录号: 2-s2.0-84963532503
论文题名: Last Glacial Maximum cirque glaciation in Ireland and implications for reconstructions of the Irish Ice Sheet
作者: Barth A.M. ; Clark P.U. ; Clark J. ; McCabe A.M. ; Caffee M.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2016
卷: 141 起始页码: 85
结束页码: 93
语种: 英语
英文关键词: Cirque
; Cosmogenic nuclide
; Ireland
; Last Glacial Maximum
; Paleoclimatology
; Quaternary
Scopus关键词: Glacial geology
; Glaciers
; Repair
; Cirque
; Cosmogenic nuclides
; Ireland
; Last Glacial Maximum
; Paleoclimatology
; Quaternary
; Ice
; cirque
; continental shelf
; cosmogenic radionuclide
; glaciation
; ice cap
; ice sheet
; ice thickness
; Last Glacial Maximum
; moraine
; paleoclimate
; reconstruction
; shelf break
; Ireland
英文摘要: Reconstructions of the extent and height of the Irish Ice Sheet (IIS) during the Last Glacial Maximum (LGM, ~19-26 ka) are widely debated, in large part due to limited age constraints on former ice margins and due to uncertainties in the origin of the trimlines. A key area is southwestern Ireland, where various LGM reconstructions range from complete coverage by a contiguous IIS that extends to the continental shelf edge to a separate, more restricted southern-sourced Kerry-Cork Ice Cap (KCIC). We present new 10Be surface exposure ages from two moraines in a cirque basin in the Macgillycuddy's Reeks that provide a unique and unequivocal constraint on ice thickness for this region. Nine 10Be ages from an outer moraine yield a mean age of 24.5 ± 1.4 ka while six ages from an inner moraine yield a mean age of 20.4 ± 1.2 ka. These ages show that the northern flanks of the Macgillycuddy's Reeks were not covered by the IIS or a KCIC since at least 24.5 ± 1.4 ka. If there was more extensive ice coverage over the Macgillycuddy's Reeks during the LGM, it occurred prior to our oldest ages. © 2016 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59591
Appears in Collections: 过去全球变化的重建
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作者单位: College of Earth, Ocean, and Atmospheric Sciences, Oregon State University, Corvallis, OR, United States; School of Environmental Science, University of Ulster, Coleraine, Northern Ireland, United Kingdom; Department of Physics and Astronomy, Purdue University, West Lafayette, IN, United States; Department of Earth, Atmospheric, and Planetary Sciences, Purdue University, West Lafayette, IN, United States
Recommended Citation:
Barth A.M.,Clark P.U.,Clark J.,et al. Last Glacial Maximum cirque glaciation in Ireland and implications for reconstructions of the Irish Ice Sheet[J]. Quaternary Science Reviews,2016-01-01,141