NDLI: Crater Degradation and Surface Erosion Rates at the Insight Landing Site , Western Elysium Planitia , Mars

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Crater Degradation and Surface Erosion Rates at the Insight Landing Site , Western Elysium Planitia , Mars

Content Provider	Semantic Scholar
Author	Sweeney, John Warner, Nicholas Hale Golombek, Matthew P. Kirk, R. L. Fergason, Robin L. Pivarunas, Anthony F.
Copyright Year	2016
Abstract	Introduction: Methods used for estimating erosion rates on Mars include in situ rover-based observations of crater modification as well as orbital analyses of crater morphology and related landforms [14]. For small craters, the latter method has been limited by the resolution of available imagery and lack of high resolution topography data. Global and regional degradation rates have been inferred from orbital data using kmsize impact craters over broad regions of the surface. For rover-based observations, most estimates of degradation have been made locally, and for craters smaller than 100 m in diameter. Here, we analyze the preservation and degradation timescales of (order of) 100-m-scale impact craters using high-resolution imagery and topographic data from the High Resolution Imaging Science Experiment (HiRISE) made available by the InSight landing site selection process. The final landing region for InSight is in southwestern Elysium Planitia on Early Hesperian-age, ridged volcanic plains. The terrains here exhibit no evidence for fluvial, lacustrine, glacial, or periglacial activity, suggesting that surface processes are limited to impact gardening and aeolian modification [5]. Our study therefore is an evaluation of how 100-mscale craters degrade over time on Mars in an environment that is most typical of an equatorial, Hesperian to Amazonian-age climate. Methods: Three HiRISE images (25 cm pixel) covering an area of 3.45 x 10 km were analyzed within the final InSight landing ellipse (Fig. 1).
File Format	PDF HTM / HTML
Alternate Webpage(s)	https://www.hou.usra.edu/meetings/lpsc2016/pdf/1576.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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