منابع مشابه
An evolutionary scheme for morphological classification of Martian gullies
Martian gullies are geologically recent small-scale features characterised by an alcove-channel-apron morphology associated on Earth with liquid water. Since their discovery by Malin and Edgett (1), several theories have been advanced to explain their formation. These typically emphasise either groundwater processes (1, 2) or melting of ground ice or snowpack (3). The former approach has been c...
متن کاملDebris Flow as a Mechanism for Forming Martian Gullies
The current low temperatures and pressures at the martian surface are not conducive to the stability of liquid water; hence the discovery of recently active, fluvial-like gullies [1, 2] presents an apparent paradox: how can these fluvial landforms have occurred if water is not stable at the surface? To approach this problem we have compared the morphometric properties of gullies in various sett...
متن کاملThe Role of Gullies in Martian Impact Crater Degradation
We found that craters in the mid-latitudes of Mars possess a marked asymmetry, which is linked with the occurrence of gullies. We also found that a prerequisite for gully formation is the occurrence of steep slopes. The analysis was performed in three areas with elevation data from the High Resolution Stereo Camera (HRSC) on-board Mars Express. Figure 1: MOLA global map with our study sites mar...
متن کاملNew Insights Into the Dynamics of Martian Gullies
Mangold, D. Mège, F. Bouchut, Institut de Physique du Globe de Paris, Université Paris-Diderot, CNRS, 4 place Jussieu, 75005 Paris, France, Laboratoire de Planétologie et de Géodynamique, Université de Nantes, CNRS, 2 rue de la Houssinière, 44000 Nantes, France, 3 Département de Mathématiques et Applications, École Normale Supérieure, CNRS, 45 rue d’Ulm, 75005 Paris, France Contact: [email protected].
متن کاملGeomorphic Analysis of the Formation Processes of Martian Gullies
Conway 1 , M. R. Balme 1 J. B. Murray 1 M. C. Towner 2 , C. Okubo 3 , and P. M. Grindrod 4 1 Planetary Surfaces Research Team, Dept. of Earth & Environmental Sciences, Open University, Walton Hall, Milton Keynes, United Kingdom, MK7 6AA [email protected] 2 Impacts and Astromaterials Research Centre, Department of Earth Science and Engineering, Imperial College London, United Kingdom SW7 ...
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ژورنال
عنوان ژورنال: Nature
سال: 2006
ISSN: 0028-0836,1476-4687
DOI: 10.1038/444800a