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Evolution of the moon: The 1974 modelThe interpretive evolution of the moon can be divided now into seven major stages beginning sometime near the end of the formation of the solar system. These stages and their approximate durations in time are as follows: (1) The Beginning: 4.6 billion years ago, (2) The Melted Shell: 4.6 to 4.4 billion years ago, (3) The Cratered Highlands: 4.4 to 4.1 billion years ago, (4) The Large Basins: 4.1 to 3.9 billion years ago, (5) The Light-colored Plains: 3.9 to 3.8 billion years ago, (6) The Basaltic Maria: 3.8 to 3.0(?) billion years ago, and (7) The Quiet Crust: 3.0(?) billion years ago to the present. The contributions of the Apollo and Luna exploration toward the study of those stages of evolution are reviewed.
Document ID
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Schmitt, H. H.
(NASA Headquarters Washington, DC United States)
Date Acquired
August 9, 2013
Publication Date
January 1, 1977
Publication Information
Publication: The Soviet-Am. Conf. on Cosmochem. of the Moon and Planets, pt. 1
Subject Category
Accession Number
Distribution Limits
Work of the US Gov. Public Use Permitted.
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