DOI: 10.1016/j.quascirev.2013.04.010
Scopus记录号: 2-s2.0-84880624248
论文题名: Late Pleistocene glacial stratigraphy of the Kumara-Moana region, West Coast of South Island, New Zealand
作者: Barrows T.T. ; Almond P. ; Rose R. ; Keith Fifield L. ; Mills S.C. ; Tims S.G.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2013
卷: 74 起始页码: 139
结束页码: 159
语种: 英语
英文关键词: 10Be
; 36Cl
; Cosmogenic nuclide
; Exposure dating
; Glacial geomorphology
; Last glacial maximum
; Late Pleistocene
; New Zealand
; Palaeoclimate
; West Coast
Scopus关键词: Cosmogenic nuclides
; Exposure dating
; Glacial geomorphology
; Last Glacial Maximum
; Late Pleistocene
; New zealand
; Palaeoclimate
; West coast
; Atmospheric temperature
; Isotopes
; Stratigraphy
; Glacial geology
; beryllium isotope
; coastal morphology
; coastal plain
; cosmogenic radionuclide
; geochronology
; glaciation
; grassland
; ice cap
; moraine
; outwash
; piedmont
; Pleistocene
; sea surface temperature
; Southern Hemisphere
; Kumara
; Moana
; New Zealand
; South Island
; West Coast [South Island]
英文摘要: On the South Island of New Zealand, large piedmont glaciers descended from an ice cap on the Southern Alps onto the coastal plain of the West Coast during the late Pleistocene. The series of moraine belts and outwash plains left by the Taramakau glacier are used as a type section for interpreting the glacial geology and timing of major climatic events of New Zealand and also as a benchmark for comparison with the wider Southern Hemisphere. In this paper we review the chronology of advances by the Taramakau glacier during the last or Otira Glaciation using a combination of exposure dating using the cosmogenic nuclides 10Be and 36Cl, and tephrochronology. We document three distinct glacial maxima, represented by the Loopline, Larrikins and Moana Formations, separated by brief interstadials. We find that the Loopline Formation, originally attributed to Oxygen Isotope Chronozone 4, is much younger than previously thought, with an advance culminating around 24,900±800yr. The widespread late Pleistocene Kawakawa/Oruanui tephra stratigraphically lies immediately above it. This Formation has the same age previously attributed to the older part of the Larrikins Formation. Dating of the Larrikins Formation demonstrates there is no longer a basis for subdividing it into older and younger phases with an advance lasting about 1000 years between 20,800±500 to 20,000±400yr. The Moana Formation represents the deposits of the last major advance of ice at 17,300±500yr and is younger than expected based on limited previous dating. The timing of major piedmont glaciation is restricted to between ~25,000 and 17,000yr and this interval corresponds to a time of regionally cold sea surface temperatures, expansion of grasslands at the expense of forest on South Island, and hemisphere wide glaciation. © 2013 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60571
Appears in Collections: 过去全球变化的重建
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作者单位: College of Life and Environmental Sciences, University of Exeter, Amory Building, Rennes Dr, Exeter, Devon EX4 4RJ, United Kingdom; Department of Soil and Physical Sciences, Lincoln University, Po Box 84, Christchurch 7647, New Zealand; Department of Geological Sciences, University of Canterbury, Private Bag 4800, Christchurch, New Zealand; Department of Nuclear Physics, Research School of Physics and Engineering, Australian National University, Canberra, ACT 0200, Australia; School of Geography, Geology and the Environment, Centre for Earth and Environmental Science Research, Kingston University London, Penrhyn Road, Kingston upon Thames KT1 2EE, United Kingdom
Recommended Citation:
Barrows T.T.,Almond P.,Rose R.,et al. Late Pleistocene glacial stratigraphy of the Kumara-Moana region, West Coast of South Island, New Zealand[J]. Quaternary Science Reviews,2013-01-01,74