[meteorite-list] Tridymite Discovered On Mars

[Paul]

NASA scientists discover unexpected mineral on Mars
NASA/Jet Propulsion Laboratory, June 22, 2016
https://www.sciencedaily.com/releases/2016/06/160622170422.htm
http://phys.org/news/2016-06-curiosity-rover-evidence-ancient-explosive.html

Richard V. Morris, David T. Vaniman, David F. Blake, Ralf
Gellert, Steve J. Chipera, Elizabeth B. Rampe, Douglas W.
Ming, Shaunna M. Morrison, Robert T. Downs, Allan H.
Treiman, Albert S. Yen, John P. Grotzinger, Cherie N.
Achilles, Thomas F. Bristow, Joy A. Crisp, David J. Des
Marais, Jack D. Farmer, Kim V. Fendrich, Jens Frydenvang,
Trevor G. Graff, John-Michael Morookian, Edward M.
Stolper, Susanne P. Schwenzer. Silicic volcanism on Mars
evidenced by tridymite in high-SiO2 sedimentary rock
at Gale crater. Proceedings of the National Academy of
Sciences, 2016; 201607098 DOI: 10.1073/pnas.1607098113
http://www.pnas.org/content/early/2016/06/07/1607098113

yours,

Paul H.