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Phone: (843) 722-7550
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9 a.m. - 6 p.m.
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Global Distribution of Large Lunar Craters: Implications for Resurfacing and Impactor Populations.
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- Author(s): Head III, James W.; Fassett, Caleb I.; Kadish, Seth J.; Smith, David E.; Zuber, Maria T.; Neumann, Gregory A.; Mazarico, Erwan
- Source:
Science. 9/17/2010, Vol. 329 Issue 5998, p1504-1507. 4p. - Source:
- Additional Information
- Subject Terms:
- Abstract: By using high-resolution aItimetric measurements of the Moon, we produced a catalog of all impact craters ≥20 kilometers in diameter on the lunar surface and analyzed their distribution and population characteristics. The most-densely cratered portion of the highlands reached a state of saturation equilibrium. Large impact events, such as Orientale Basin, locally modified the prebasin crater population to ∼2 basin radii from the basin center. Basins such as Imbrium, Orientale, and Nectaris, which are important stratigraphic markers in lunar history, are temporally distinguishable on the basis of crater statistics. The characteristics of pre- and postmare crater populations support the hypothesis that there were two populations of impactors in early solar system history and that the transition occurred near the time of the Orientale Basin event. [ABSTRACT FROM AUTHOR]
- Abstract: Copyright of Science is the property of American Association for the Advancement of Science and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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