文章基本信息

标题：Landscapes of polyphase glaciation: eastern Hellas Planitia, Mars
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作者：Stephen Brough ; Bryn Hubbard ; Colin Souness 等
期刊名称：Journal of Maps
印刷版ISSN：1744-5647
出版年度：2016
卷号：12
期号：3
页码：530-542
DOI：10.1080/17445647.2015.1047907
出版社：Journal of Maps
摘要：The mid-latitudes of Mars host numerous ice-related landforms that bear many similarities to terrestrial ice masses. This collection of landforms, termed viscous flow features (VFFs), is composed primarily of H 2 O ice and shows evidence of viscous deformation. Recent work has hypothesised that VFFs are the diminishing remains of once larger ice masses, formed during one or more previous ice ages, and the landscape therefore records evidence of polyphase glaciation. However, debate persists concerning the former extent and volume of ice, and style of former glaciations. The accompanying map (1:100,000 scale) presents a geomorphic and structural assessment of a glacial landscape in eastern Hellas Planitia, Mars. Here, we present a description of the features identified, comprising four geomorphic units (plains, lobate debris apron, degraded glacial material, and glacier-like form) and 16 structures (craters, moraine-like ridges, flow unit boundaries, arcuate transvers structures, longitudinal surface structures, ring-mold craters, terraces, medial moraine-like ridges, raised textured areas, flow-parallel and flow-transverse lineations, crevasses and crevasse traces, and ridge clusters).
关键词：Mars; ice; glaciation; lobate debris apron; glacier-like form; mid-latitude; climate change