DOI: 10.1016/j.quascirev.2016.02.024
论文题名: Deglaciation and postglacial environmental changes in the Teton Mountain Range recorded at Jenny Lake, Grand Teton National Park, WY
作者: Larsen D.J. ; Finkenbinder M.S. ; Abbott M.B. ; Ofstun A.R.
刊名: Quaternary Science Reviews
出版年: 2016
卷: 138 起始页码: 62
结束页码: 75
语种: 英语
英文关键词: Deglaciation
; Glacier Peak tephra
; Grand Teton National Park
; Holocene climate change
; Lake sediment
; Teton fault
; Western U.S.
Scopus关键词: Climate change
; Glacial geology
; Lakes
; Sedimentation
; Deglaciations
; Holocene climate change
; Lake sediments
; Teton National Park
; Western U.S
; Sediments
; clastic sediment
; climate variation
; deglaciation
; environmental conditions
; Holocene
; lacustrine deposit
; paleoenvironment
; Postglacial
; radiocarbon dating
; sediment core
; tephra
; vegetation cover
; Cascade Range
; Glacier Peak
; Grand Teton National Park
; Jenny Lake
; United States
; Washington [United States]
; Wyoming
; Mazama
英文摘要: Sediments contained in lake basins positioned along the eastern front of the Teton Mountain Range preserve a continuous and datable record of deglaciation and postglacial environmental conditions. Here, we develop a multiproxy glacier and paleoenvironmental record using a combination of seismic reflection data and multiple sediment cores recovered from Jenny Lake and other nearby lakes. Age control of Teton lake sediments is established primarily through radiocarbon dating and supported by the presence of two prominent rhyolitic tephra deposits that are geochemically correlated to the widespread Mazama (~7.6 ka) and Glacier Peak (~13.6 ka) tephra layers. Multiple glacier and climate indicators, including sediment accumulation rate, bulk density, clastic sediment concentration and flux, organic matter (concentration, flux, δ13C, δ15N, and C/N ratios), and biogenic silica, track changes in environmental conditions and landscape development. Sediment accumulation at Jenny Lake began centuries prior to 13.8 ka and cores from three lakes demonstrate that Teton glacier extents were greatly reduced by this time. Persistent ice retreat in Cascade Canyon was slowed by an interval of small glacier activity between ~13.5 and 11.5 ka, prior to the end of glacial lacustrine sedimentation ~11.5 ka. The transition to non-glacial sediments marks the onset of Holocene conditions at Jenny Lake and reflects a shift toward warmer summers, increased vegetation cover, and landscape stability in the Tetons. We discuss the Teton lake sediment records within the context of other regional studies in an effort to construct a comprehensive overview of deglaciation and postglacial environmental conditions at Grand Teton National Park. © 2016 Elsevier Ltd. 资助项目: Larsen, D.J.
; Department of Geology and Environmental Science, University of PittsburghUnited States
; 电子邮件: djlarsen@pitt.edu
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59626
Appears in Collections: 过去全球变化的重建
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作者单位: Department of Geology and Environmental Science, University of Pittsburgh, Pittsburgh, PA, United States
Recommended Citation:
Larsen D.J.,Finkenbinder M.S.,Abbott M.B.,et al. Deglaciation and postglacial environmental changes in the Teton Mountain Range recorded at Jenny Lake, Grand Teton National Park, WY[J]. Quaternary Science Reviews,2016-01-01,138