Previously unrecognized large lunar impact basins revealed by topographic data

Herbert V. Frey, NASA Goddard
39th Lunar and Planetary Science Conference

Lunar and Planetary Institute, Houston
March 2008

Lunar topographic data reveal a significant population of large impact basins not previously recognized by standard photogeologic mapping. We find at least 92 impact basins > 300 km diameter, compared with 45 previously cataloged. This has implications for the Late Heavy Bombardment on the Moon and use of the Moon as a standard for crater retention ages throughout the solar system.

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