Mild Temperature Carbonates in Allan Hills 84001

Wet and mild: Researchers take the temperature of 
Mars's past by Marcus Woo, October 12, 2011, 
http://www.physorg.com/news/2011-10-mild-temperature-mars.html

Halevy, I., W. W. Fischer, and J. M. Eiler, 2011, 
Carbonates in the Martian meteorite Allan Hills 84001 
formed at 18 ± 4 °C in a near-surface aqueous 
environment. Proceedings of the National Academy 
of Sciences. Published online before print October 
3, 2011, doi: 10.1073/pnas.1109444108
http://www.pnas.org/content/early/2011/09/26/1109444108.abstract

Best wishes,

Paul H.