Cold glaciers erode and deposit: Evidence from Allan Hills, Antarctica
Cold glaciers erode and deposit: Evidence from Allan Hills, Antarctica
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寒冷的冰川侵蚀和沉积：来自南极洲艾伦山的证据
DOI：
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发表时间：
2002
期刊：
影响因子：
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通讯作者：
S. R. Hicock
中科院分区：
文献类型：
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作者：
C. Atkins;P. Barrett;S. R. Hicock
在这里，我们报告以前未描述的功能的侵蚀和沉积的冷（极地）冰川。最近的一项研究挑战了冷冰川既不会滑动也不会磨损其河床的假设，但没有提供地质证据。我们描述的特征包括磨损痕迹，冰下沉积物，glaciotectonically变形基板，孤立的块，冰芯碎片土丘，巨石列车，最近的冷冰前进和后退的所有产品。绘制南极洲其他地方的这些特征将记录东南极冰盖边缘最近的变化，为区域质量平衡变化提供新的见解。
Here we report previously undescribed features of erosion and deposition by a cold (polar) glacier. A recent study challenged the assumption that cold glaciers neither slide nor abrade their beds, but no geological evidence was offered. The features we describe include abrasion marks, subglacial deposits, glaciotectonically deformed substrate, isolated blocks, ice-cored debris mounds, and boulder trains, all products of a recent cold ice advance and retreat. Mapping these features elsewhere in Antarctica will document recent shifts in the East Antarctic Ice Sheet margin, providing new insight on regional mass-balance changes.