Formation of Ice-rich Lobate Debris Aprons through Regional Icesheet Col- Lapse and Debris-cover Armoring
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منابع مشابه
Formation of lobate debris aprons on Mars: Assessment of regional ice sheet collapse and debris-cover armoring
Lobate debris aprons (LDA) are lobate-shaped aprons surrounding scarps and isolated massifs that are concentrated in the vicinity of the northern Dichotomy Boundary on Mars. LDAs have been interpreted as (1) ice-cemented talus aprons undergoing viscous flow, (2) local debris-covered alpine-like glaciers, or (3) remnants of the collapse of a regional retreating ice sheet. We investigate the plau...
متن کاملOrigin of martian northern hemisphere mid-latitude lobate debris aprons
Lobate debris aprons in the martian midto high-latitudes (northern and southern hemispheres) have been interpreted as ice-related features that indicate periglacial climate conditions as recently as late Amazonian. Using MOLA topographic profiles perpendicular to apron flow fronts, we surveyed 36 debris aprons in the northern hemisphere found in the regions of Mareotis, Protonilus, and Deuteron...
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Introduction. The Martian mid-latitudes are regions of high scientific interest given recent descriptions of mantling deposits and glacial features believed to be relicts of recent ice ages on Mars [1-4]. Geomorphic indicators of ground ice have long been proposed to be concentrated in mid-latitude zones based on analyses of such features as lobate debris aprons, lineated valley fill, and conce...
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0019-1035/$ see front matter 2011 Elsevier Inc. A doi:10.1016/j.icarus.2011.07.018 ⇑ Corresponding author. E-mail addresses: [email protected] (J.L. Fasto (J.W. Head). A fretted valley system on Mars located at the northern mid-latitude dichotomy boundary contains lineated valley fill (LVF) with extensive flow-like features interpreted to be glacial in origin. We have modeled this deposit using...
متن کاملLineated valley fill and lobate debris apron stratigraphy in Nilosyrtis Mensae, Mars: Evidence for phases of glacial modification of the dichotomy boundary
[1] The Nilosyrtis Mensae region is important among dichotomy boundary fretted terrain outcrops, as it provides evidence of overprinting of ancient landscapes by a suite of glacial features, providing a composite view of the variety of midlatitude glacial modification processes that can occur during recent Martian ice ages. On the basis of a series of criteria developed for the identification o...
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