Fluted moraine formation and till genesis below a temperate valley glacier: Slettmarkbreen, Jotunheimen, southern Norway
Fluted moraine formation and till genesis below a temperate valley glacier: Slettmarkbreen, Jotunheimen, southern Norway
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温带山谷冰川下方的凹槽状冰碛形成和耕作成因：挪威南部尤通黑门州的 Slettmarkbreen
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发表时间：
1994
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通讯作者：
D. Benn
中科院分区：
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作者：
D. Benn
碎屑结构和形态数据被用来确定最近挪威Slettmarkbreen冰川退缩暴露的冰下凹槽的起源。一种解释碎屑织物数据的新方法可以重建岩石的应变和沉积历史。沿离散剪切面滑动形成的沉降和底下变形的组合。大粒径颗粒（> - 125 mm）以沉降为主，而小粒径颗粒更容易发生变形。沟槽状的堆积体表面反映了堆积体基质在堆积体背风处向低围压区域变形的趋势。人们认为，冰川下流的组成部分导致了大量沉积物向边缘转移。
Clast fabric and morphological data have been used to determine the origin of fluted subglacial tills exposed by recent retreat of the Slettmarkbreen glacier, Norway. A new method for the interpretation of clast fabric data allows aspects of the strain and depositional history of the till to be reconstructed. The till formed by a combination of lodgement and subsole deformation by slip along discrete shear planes. Lodgement was dominant for the larger size fractions (>125 mm), while the smaller material was more susceptible to deformation. The fluted till surface reflects the tendency for the till matrix to deform into regions of low confining pressure in the lee of lodged boulders. Downglacier components of till flow are thought to have resulted in significant sediment transfer towards the margin.