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Extensive Secondary Chaos Formation Along Simud Vallis, Mars
| Content Provider | Semantic Scholar |
|---|---|
| Author | Rodriguez, J. A. Palmero Kargel, Jeffrey S. Crown, David A. Tanaka, Kenneth L. |
| Copyright Year | 2008 |
| Abstract | Introduction: The region of southern circum-Chryse on Mars contains large plateau zones that have undergone collapse, forming low-lying depressions floored by broken-up and morphologically diverse blocks. These collapsed terrains, traditionally referred to as chaotic terrains, commonly occur in close spatial association with Martian outflow channels. Martian chaotic terrains and outflow channels have been intensively studied since the 1970's [e.g., 1-5]. The consensus is that chaotic terrains represent zones where aquifer destabilization led to ground collapse and to the release of vast amounts of fluids at the surface, which subsequently carved the higher and lower outflow channels. Whereas the higher outflow channels consist of ~20to 50 km-wide canyons, the floors of which are marked by dense erosional morphologies, the lower outflow channels consist of even broader valleys (a few 100 km-wide), the floors of which appear to largely consist of debris flows [e.g., 6]. Fig. 1. (a) View of Simud chaos (part of THEMIS IR mosaic centered at -10.06 ̊ N; 322,31 ̊ E). (b) View of northern margin of Simud Chaos. Shown is the location of Fig. 2a (gray-scale MOLA-based shaded DEM (128 pixels/degree) centered at 13.81 ̊ N; 321,15 ̊ E). (c) Perspective view of MOLA-based shaded DEM (128 pixels/degree) and related elevation profile (A-A'). An obvious implication of this hypothesis is that the formation of chaotic terrains necessarily pre-dated the excavation of their associated outflow channels. Yet, some chaotic terrains formed within the floors of outflow channels, and thus must post-date the excavation of the channel floors they modify. These chaotic terrains, known as secondary chaotic terrains, have been previously described in the higher outflow channel floors [5,7]. In this work, we present a synthesis of the morphologic attributes of a secondary chaotic terrain located along the lower outflow channel of Simud Vallis (hereafter refered to as Simud chaos) (Fig. 1). |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://www.lpi.usra.edu/meetings/lpsc2008/pdf/1522.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
