PerspectivePlanetary Science

Salty Old Rocks

Science  09 Jun 2000:
Vol. 288, Issue 5472, pp. 1761-1762
DOI: 10.1126/science.288.5472.1761

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Small grains of halite in meteorites are generally interpreted as a sign of the former presence of water. In his Perspective, Ott discusses the unexpected discovery of halites in relatively highly metamorphosed meteorites. According to the age determined by Whitby et al. for halite crystals in one of these meteorites, they are among the oldest known materials in the solar system.