Physics
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agufm.p31b0124b&link_type=abstract
American Geophysical Union, Fall Meeting 2006, abstract #P31B-0124
Physics
5415 Erosion And Weathering, 5470 Surface Materials And Properties, 6225 Mars, 6297 Instruments And Techniques
Scientific paper
The surface topology of rock-like targets abraded in the wind tunnel were measured with a ~300 μm precision laser scanner, an order of magnitude improvement over previous in situ techniques. Quantified sub- millimeter- to millimeter-scale changes provided information on the relationships between natural rock abrasion and textures. As abrasion proceeded for non-layered targets, the number of pits initially increased, then decreased as pits merged. These trends were mirrored by an increase in the average size and elongation of pits in the downwind direction. Layered targets lacked large pits, instead showing development of prominent stair-case topography, with ramp slope angles increasing with time. Natural rocks in desert environments show many of the textural parameters documented in the scanned wind tunnel rocks. Correlation of these parameters reveals information about the amount of time the rocks have been abraded, offering a new tool for constraining rock history.
Ali Saqib
Bridges Nathan T.
Eddlemon Eric E.
Greeley Ronald
Kushunapally R.
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