The glacial geomorphology of the Lago Buenos Aires and Lago Pueyrredón ice lobes of central Patagonia. / Bendle, Jacob; Thorndycraft, Varyl; Palmer, Adrian.

In: Journal of Maps, Vol. 13, No. 2, 2017, p. 654-673.

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Abstract

This paper presents a glacial geomorphological map of landforms produced by the Lago General Carrera-Buenos Aires and Lago Cochrane-Pueyrredón ice lobes of the former Patagonian Ice Sheet. Over 35,000 landforms were digitised into a Geographical Information System from high-resolution (<15 m) satellite imagery, supported by field mapping. The map illustrates a rich suite of ice-marginal glacigenic, subglacial, glaciofluvial and glaciolacustrine landforms, many of which have not been mapped previously (e.g. hummocky terrain, till eskers, eskers). The map reveals two principal landform assemblages in the central Patagonian landscape: (i) an assemblage of nested latero-frontal moraine arcs, outwash plains or corridors, and inset hummocky terrain, till eskers and eskers, which formed when major ice lobes occupied positions on the Argentine steppe; and (ii) a lake-terminating system, dominated by the formation of glaciolacustrine landforms (deltas, shorelines) and localized ice-contact glaciofluvial features (e.g. outwash fans), which prevailed during deglaciation.
Original languageEnglish
Pages (from-to)654-673
Number of pages20
JournalJournal of Maps
Volume13
Issue number2
Early online date26 Jul 2017
DOIs
Publication statusPublished - 2017
This open access research output is licenced under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License.

ID: 28307038