Till and Moraine Formation in Dry Areas

Metadata record for data from ASAC Project 385 See thelink below for public details on this project.From the abstract of the referenced paper:During the Australian National Antarctic Research Expeditions (ANARE) Voyage 6, 1987, observations were made of heavily glaciated Heard Island. Features of moraines and their sediments were recorded at three glaciers at the north-western part of the island. They indicated that in these glaciers basal movements has little corrosive effect. Erosion with up-transport of debris occurs mainly at the transition from steeper to lower gradients. Moraines formed there may contain basal till. In other positions moraines are formed mainly of supraglacial debris from rockfalls or wind transport. The moraine sediments are mainly waterlaid or debris flows and, in places, possibly flow till.

ASAC项目385的数据集元数据记录。有关该项目的公开详情，请参阅下方链接。详见所引用论文的摘要：1987年，在澳大利亚国家南极考察队（Australian National Antarctic Research Expeditions，ANARE）第6次考察航次期间，科研人员对被厚层冰川覆盖的赫德岛开展了观测工作。研究团队对该岛西北部三座冰川的冰碛地貌及其沉积特征进行了记录。观测结果表明，此类冰川的底部运动几乎未产生侵蚀效应。伴随碎屑向上搬运的侵蚀作用，主要发生在坡度由陡转缓的过渡区域。在此处形成的冰碛可能包含底碛（basal till）。在其他区域，冰碛主要由岩崩产生的碎屑或经风力搬运的冰面碎屑构成。该冰碛沉积物主要为水成沉积或碎屑流沉积，部分区域还可能存在流碛（flow till）。