Evolving Theories on the Origin of the Moon by Warren D. Cummings

Author:Warren D. Cummings
Language: eng
Format: epub, pdf
ISBN: 9783030291198
Publisher: Springer International Publishing

Another example of how lunar research was affecting research on the evolution of the Earth appears in the talk given by Richard Grieve and Marc Parmentier of Brown University, titled “Considerations of large scale impact and the early Earth.” They said:The earth’s crustal evolution during the first 800 my of its history is conjectural. The lack of a very early crust may indicate that thermal and mechanical instabilities resulting from intense mantle convection and/or bombardment inhibited crustal preservation. Whatever the case, the potential effects of large scale impact have to be considered in models of early earth evolution.

The number of impacts can be estimated from the cratering record in the lunar highlands , corrected for terrestrial impact conditions … (Grieve & Parmentier, 1985: 23)

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