.png){kind=icon}
返回
Reconstructing ice-margin retreat using delta morphostratigraphy
.png){kind=icon}
OA
AI
DOI：10.1038/s41598-017-16763-x.png)
.png){kind=icon}
.png){kind=icon}
分享.png){kind=icon}
收藏
摘要
En 中文
The paleogeographic reconstruction of the successive inland positions of a retreating ice sheet is generally constrained by mapping moraines. However, deltaic complexes constructed by sediment-charged meltwater can also provide a record of the retreating ice-margin positions. Here, we examine a serie of ice-contact, ice-distal glaciofluvial and paraglacial depositional systems that developed along the Quebec North Shore (eastern Canada) in the context of falling relative sea level during the northward retreat of the Laurentide Ice Sheet (LIS). Ice-contact depositional systems formed when the LIS was stillstanding along the Quebec North Shore. Subsequent inland retreat of the ice margin generated glacial meltwaters feeding sediment to glaciofluvial deltas, leading to their rapid progradation. The retreat of the ice margin from drainage basins was marked by the onset of paraglacial processes such as the shutdown of delta progradation, severe fluvial entrenchment, and deposition of shallow-marine strata. Four end-member scenarios describe the spatial and stratigraphic distribution of these three depositional systems (ice-contact deposits, ice-distal glaciofluvial deltas, and paraglacial suites). They reflect both the inherited drainage basin physiography and the retreat pattern of the ice margin. Applied to twenty deltaic complexes, these end-members allowed us to refine the model of LIS-margin retreat over southeastern Quebec.
Keyword:
SEDIMENT DENSITY FLOWS
HOLOCENE DEGLACIATION
LABRADOR SECTOR
ARCHITECTURE
FACIES
QUEBEC
FJORD
STRATIGRAPHY
QUATERNARY
BEDFORMS
AI总结
对已上传原文的论文进行重点信息的提取，主要内容包括：简要概述、研究摘要、背景介绍、关键亮点、图文解析、展望与总结。
期刊
IF:
3.9
论文数:
28.0W
被引数:
83.5W
机构
引用论文
Multichannel sampling and reconstruction of bandlimited signals in the linear canonical transform domain带限信号在线性 canonical 变换域的多通道采样与重构
PREAI
分享收藏An assessment of the minimum timing of ice free conditions of the western Laurentide Ice Sheet评估西部Laurentide冰盖无冰条件的最小时间OAAI
OAAI分享收藏Efficacy of Helicobacter pylori eradication therapies in Korea: A systematic review and network meta‐analysis.png)
Helicobacter
HelicobacterIF0
PREAI
分享收藏
查看更多内容