The glacial geomorphology of the Lago Buenos Aires and Lago Pueyrredón ice lobes of central Patagonia

• Main Authors: Bendle, Jacob M., Varyl R. Thorndycraft, Palmer, Adrian P.
• Format: Dataset
• Language: unknown
• Published: Taylor & Francis 2017
• Subjects: Neuroscience; Evolutionary Biology; FOS Biological sciences; 59999 Environmental Sciences not elsewhere classified; FOS Earth and related environmental sciences; 39999 Chemical Sciences not elsewhere classified; FOS Chemical sciences; Ecology; 20199 Astronomical and Space Sciences not elsewhere classified; FOS Physical sciences; Cancer; Plant Biology; Computational Biology; Argentine; Carrera; Patagonia; Ice Sheet
• Online Access: https://dx.doi.org/10.6084/m9.figshare.5245705.v1; https://figshare.com/articles/The_glacial_geomorphology_of_the_Lago_Buenos_Aires_and_Lago_Pueyrred_n_ice_lobes_of_central_Patagonia/5245705/1

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 digitized 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.