Carbonation may have grounded Mars’ atmosphere
Process could have forced Red Planet’s atmospheric carbon dioxide into the dirt
![](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2013/10/ticker_mmeteorite860.jpg?fit=860%2C460&ssl=1)
Veins of clay (green) surround both the carbonate (orange) and olivine (blue) in this false-color microscopy image of a sliver of the Lafayette meteorite.
SUERC/Univ. of Glasgow