The Role of Gullies in Martian Impact Crater Degradation
نویسنده
چکیده
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 marked in pink: N = “Noachis”, C = “Cimmeria” and A = “Acidalia”.
منابع مشابه
Comparison of Martian Gullies and Lunar Crater-wall Landslides
I present lunar landslides that bear a striking resemblance to some martian gullies, despite the lack of water on the Moon both today and in the past. This observation indicates that gully features can be formed via a dry landslide mechanism. Thus on Mars, morphology alone is insufficient to determine the mechanism of formation of these features. Introduction: In 2000, Malin and Edgett (1) repo...
متن کاملGasa impact crater, Mars: Very young gullies formed from impact into latitude-dependent mantle and debris-covered glacier deposits?
The mode of formation of gullies on Mars, very young erosional–depositional landforms consisting of an alcove, channel, and fan, is one of the most enigmatic problems in martian geomorphology. Major questions center on their ages, geographic and stratigraphic associations, relation to recent ice ages, and, if formed by flowing water, the sources of the water to cause the observed erosion/deposi...
متن کاملFluvial Discharge Rates of Martian Gullies: Slope Measurements from Stereo Hirise Images and Numerical Modeling of Sediment Transport
Introduction: A stereo pair of HiRISE images of a pole-facing crater slope at 38S, 218E shows many fresh looking gullies. After measuring slopes using the stereo viewing geometry, we estimate the expected fluvial discharge rates using theory from Kleinhans [1] and Ikeda [2]. We also develop a numerical model of sediment transport based on theory presented in Kleinhans [1] to determine the time ...
متن کاملErosional modification and gully formation at Meteor Crater, Arizona: Insights into crater degradation processes on Mars
0019-1035/$ see front matter 2010 Elsevier Inc. A doi:10.1016/j.icarus.2010.03.032 * Corresponding author at: Room No. 122, Main Bu Research Institute, Council of Scientific and Industria Uppal Road, Hyderabad 500 606, Andhra Pradesh, Ind E-mail addresses: [email protected], senthil@ Hydrogeological modification of Meteor Crater produced a spectacular set of gullies throughout the interior ...
متن کاملGullies and landslides on the Moon: Evidence for drygranular flows
[1] High-resolution images from Chandrayaan-1 Terrain Mapping Camera and Lunar Reconnaissance Orbiter Camera reveal landslides and gully formation on the interior wall of a 7 km-diameter simple crater emplaced in Schrödinger basin on the farside of the Moon. These features occur on the steep upper crater wall, where the slope is ~35 . The gullies show a typical alcove-channel-fan morphology. So...
متن کامل