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The intercrater plains of Mercury and the Moon: Their nature, origin and role in terrestrial planet evolution. Chronology of surface history of MercuryPhases in the history of the planet Mercury include: (1) condensation and accretion; (2) heating; (3) planetary expansion during heavy bombardment; (4) tidal spin-down and lineament formation; (5) P5 plains emplacement; (6) P4 plains emplacement; (7) peak planetary volume in P3 period; (8) scarp formation; (9) Caloris Basin formation, late class 3; (10) scarp formation and P2 plains formation; (11) smooth plains formation in and around large basins; (12) late or local tectonic stress; and (13) quiescent class 1 period. Although the cooling and contraction of the lithosphere are complete, the core remains molten as an active dynamo, producing the magnetic fields detected by Mariner 10. Plains produced since core formation (P3 to P-1) should record its magnetic activity. Cratering during the Class 2 and Class 1 periods is probably not enough to distribute ballistic materials and homogenize any color differences.
Document ID
Document Type
Leake, M. A.
(Arizona Univ. Tucson, AZ, United States)
Date Acquired
August 11, 2013
Publication Date
September 1, 1982
Publication Information
Publication: NASA, Washington Advan. in Planetary Geol.
Subject Category
Lunar And Planetary Exploration
Accession Number
Funding Number(s)
Distribution Limits
Work of the US Gov. Public Use Permitted.

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