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Contrasts in evolution of Venus and EarthThe differences of the two planets in dynamical characteristics and inert gas abundances require major differences of formation. There probably was an impact into the Earth much greater than any into Venus. The resulting heat pulse would have caused more rapid and thorough outgassing of the Earth, lending to an ocean retaining water. Water is the key to the differences in evolution between the planets. A most important consequence was less effective recycling of lithosphere on Venus, leading to a thick global crust which suppressed plate tectonics. Stratification is more pronounced in Venus, but there must remain sufficient heat sources at depth for convective support of the high plateaus.
Document ID
19850025567
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Kaula, W. M.
(National Geodetic Survey Rockville, MD, United States)
Date Acquired
August 12, 2013
Publication Date
January 1, 1985
Publication Information
Publication: Lunar and Planetary Inst. Terrest. Planets: Comp. Planetology
Subject Category
Lunar And Planetary Exploration
Accession Number
85N33880
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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