abstract a mountain glacier, when it occupies a river valley, immediately begins to change the cross-section and profile of that valley. river valleys in mountain areas tends to have v-shaped profiles. glaciers work to widen as well as deepen their valleys and the typical cross-section of a glacial valley is u-shaped. the u-shaped glacial valley is one of the most characteristic of glacial land...

The morphology of glacial valley can be described in terms of power law or quadratic equations fitted to valley cross-profiles. These two models are used to study the cross-profiles of 86 valley cross-profiles in the Zardkuh Mountain in order to understand the evolutional patterns of valleys. Assessment of using the power law function indicates that b values for both valley sides range from 1.0...

[1] Glacial occupation of alpine valleys results in a distinct signature in the long-valley profile, including steepening of the profile in the headwaters, flattening at lower elevations, and a step in the profile at the convergence of headwater tributaries. We present analytic results for glacial erosion patterns by making the following assumptions: (1) the initial profile is linear, (2) the w...

The morphology of the western Alps has been strongly influenced by Quaternary glaciations. On the basis of observations of glacial morphology in the Belledonne, Grandes-Rousses, Taillefer and Pelvoux-Ecrins Massifs (south-eastern France), we reconstitute the glacial trimline and equilibrium line altitude (ELA) during the most extensive glaciation (MEG). Our best estimate of the MEG ELA is 1800±...

Some of Earth’s greatest relief occurs where glacial processes act on mountain topography1,2. This dramatic landscape is thought to be an imprint of Pleistocene glaciations3,4. However, whether the net effect of glacial erosion on mountains is to increase5–7 or decrease8–10 relief remains disputed. It has been suggested that in the European Alps, the onset of widespread glaciation since the mid...

[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...

This paper presents the first glacial chronology for the Lahul Himalaya, Northern India. The oldest glaciation, the Chandra Glacial Stage, is represented by glacially eroded benches at altitudes greater than 4300 m above sea-level. This glaciation was probably of a broad valley type. The second glaciation, the Batal Glacial Stage, is represented by highly weathered and dissected lateral moraine...

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...

.......................................................................................................................................2 Overview of Yosemite’s History .................................................................................................2 Yosemite Discovery...................................................................................................................

Introduction: A 30,000 km valley system at ~34E, 41N in the Deuteronilus-Protonilus Mensae (DPM) region has been interpreted as a relict integrated debriscovered valley glacial system (Fig 1a) [1] and is typical of dozens of fretted valleys along the dichotomy boundary [2]. In order to assess this hypothesis, we compare results from the University of Maine Ice Sheet Model (UMISM) to the feature...