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Controlled, ice-cored moraines: sediments andgeomorphology. An example from Ragnarbreen, Svalbard

机译:受控制的冰芯花rain:沉积物和地貌。斯瓦尔巴群岛Ragnarbreen的一个例子

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End moraine of the Ragnarbreen consists of three subzones: (1) outer moraine ridge, (2) culmination moraine ridge and (3) inner moraine plateau. Reworking processes were and still are the main factor nfluencing the morphology and sediment distribution in the end moraine complex of the Ragnarbreen. However, the intensity of gravity flows is much lower now than it was in the early stages of end moraine complex development. Presently the end, ice-cored moraine complex of the Ragnarbreen is stable - more than 90 % percent of its area does not undergo severe transformation - except for small areas that are ndercut by rivers or streams. The stability of the ice-cored moraines is due mainly to the thickness of the covering debris, which protects the ice from melting. The occurrence of fine sediments on the contem porary hills suggests that the end moraine complex has undergone at least one cycle of topographic inversion. The analysis of landforms and deposits occurring in the end moraine complex of the Ragnarbreen revealed patterns in the morphology such as the lineation of hillocks and depressions, parallel to the edge of the moraine complex.
机译:Ragnarbreen的冰m末端由三个分区组成:(1)冰m外脊;(2)冰m高岭;(3)冰m内高原。返工过程一直是并且仍然是影响Ragnarbreen末端冰ora复合物中形态和沉积物分布的主要因素。但是,现在重力流的强度远低于冰complex最终复合体发展的早期阶段。目前,Ragnarbreen的冰芯冰m复合物处于稳定状态-超过90%的区域没有进行严重的改造-除了被河流或溪流侵蚀的小区域外。冰芯葡萄粒的稳定性主要归因于覆盖碎片的厚度,该碎片可保护冰免于融化。在当代山丘上细小沉积物的出现表明冰m末复合体至少经历了一次地形反转。对Ragnarbreen末端冰ora复合物中发生的地貌和沉积物的分析揭示了形态上的模式,例如与冰ora复合物边缘平行的丘陵和洼地线。

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