Lunar overlay depth in mare tranquillitatus, Alphonsus, and nearby highlands
1966; Elsevier BV; Volume: 5; Issue: 1-6 Linguagem: Inglês
10.1016/0019-1035(66)90067-4
ISSN1090-2643
Autores Tópico(s)Astro and Planetary Science
ResumoPhotographs of lunar craters obtained by the spacecraft Ranger 8 and Ranger 9 have been compared with those of laboratory craters overlain with known amounts of granular material. Results are consistent with the interpretation that at least 5 meters of granular material, and probably considerably more, have been deposited on Mare Tranquillitatus, Alphonsus, and nearby highland areas, subsequent to the formation of most of the craters 55 meters in diameter or larger. This applies to both impact craters and those apparently of volcanic origin. The appearance of craters smaller than 30 meters in diameter is consistent with less deposit of overlay subsequent to crater formation; hence these craters are believed to be newer.
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