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Erosion and the rocks of VenusPhotographs 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.
Document ID
19760048804
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Sagan, C.
(Cornell University Ithaca, N.Y., United States)
Date Acquired
August 8, 2013
Publication Date
May 6, 1976
Publication Information
Publication: Nature
Volume: 261
Subject Category
Lunar And Planetary Exploration
Accession Number
76A31770
Distribution Limits
Public
Copyright
Other

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