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Notes on till and Moraine Formation at Some Heard Island Glaciers

Jan Lundqvist
Geografiska Annaler. Series A, Physical Geography
Vol. 70, No. 3 (1988), pp. 225-234
Published by: Wiley on behalf of the Swedish Society for Anthropology and Geography
DOI: 10.2307/521074
Stable URL: http://www.jstor.org/stable/521074
Page Count: 10
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Notes on till and Moraine Formation at Some Heard Island Glaciers
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Abstract

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 northwestern part of the island. They indicated that in these glaciers basal movements has little erosive 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.

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