Encyclopedia of Astrobiology

2015 Edition
| Editors: Muriel Gargaud, William M. Irvine, Ricardo Amils, Henderson James (Jim) CleavesII, Daniele L. Pinti, José Cernicharo Quintanilla, Daniel Rouan, Tilman Spohn, Stéphane Tirard, Michel Viso

Rima, Rimae

  • Stephan van GasseltEmail author
Reference work entry
DOI: https://doi.org/10.1007/978-3-662-44185-5_1378



Rimae are arcuate, sinuous, or straight grooves on the lunar surface and are thought to have an endogenic origin, that is, either tectonic or volcanic. On July 30, 1971, Apollo 15 landed near Rima Hadley (also termed Hadley Rille, 25°N, 3°E) and took photographs of that area. Rima Hadley is a steep-walled meandering rille that has a length of more than 100 km, a width of 1–2 km, and a depth of up to 400 m. It is of lava-flow origin and is the only place where lunar  rock outcrops have been observed. Thus far, 111 lunar features have been named rimae.

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© Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  1. 1.Planetary Sciences and Remote SensingInstitute of Geological Sciences, Freie Universität BerlinBerlinGermany