Tridymite Discovered On Mars

Tridymite Discovered On Mars

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.