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Science 9 June 2000:
Vol. 288. no. 5472, pp. 1761 - 1762
DOI: 10.1126/science.288.5472.1761
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Perspectives

Also see the archival list of Science's Compass: Enhanced Perspectives

PLANETARY SCIENCE:
Enhanced: Salty Old Rocks

Ulrich Ott

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.

The author is at the Max-Planck-Institut für Chemie (Otto-Hahn-Institut), Becherweg 27, D-55128 Mainz, Germany. E-mail: ott{at}mpch-mainz.mpg.de

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Science. ISSN 0036-8075 (print), 1095-9203 (online)