Physics
Scientific paper
May 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976natur.261q..31s&link_type=abstract
Nature, vol. 261, May 6, 1976, p. 31. NASA-supported research.
Physics
Corrosion, Erosion, Planetary Surfaces, Rocks, Venus (Planet), Craters, Petrology, Spaceborne Photography, Venus Atmosphere, Weathering
Scientific paper
Photographs of the surface of Venus returned by the Venera 9 and 10 spacecraft have revealed the presence of smooth and angular rockline forms. Two mechanisms previously suggested (Sagan, 1975) for erosion of crater ramparts on the surface of Venus might also explain the erosion of rocks. Chemical weathering by the hydrochloric, hydrofluoric, and sulfuric acids present in the atmosphere of Venus may have been sufficient to erode angular projections of silicous rocks. Alternatively, the contours of rocks containing such low-melting materials as NaOH, KOH, HgS and KNO2 may have softened as the result of exposure to the high surface temperatures of the planet.
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