Abstract
RECENT close-up photographs of the lunar surface on the western shores of Oceanus Procellarum, televized back to Earth by the Russian soft-lander Luna 9 on February 4, revealed for the first time the detailed micro-structure of typical mare ground down to a cm–mm scale. While the conspicuous surface roughness manifest on this scale could have been anticipated from previous radar-echo work1, and while most—if not all—of it may be due to micro-meteoritic etching, this new evidence of severely local nature gives rise to wider issues concerning the origin of lunar maria which have so far not been mentioned in this connexion.
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KOPAL, Z. On the Possible Origin of the Lunar Maria. Nature 210, 188 (1966). https://doi.org/10.1038/210188a0
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DOI: https://doi.org/10.1038/210188a0
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