Fig. 1
From: Elevated olivine weathering rates and sulfate formation at cryogenic temperatures on Mars
SEM secondary electron images and EDS spectra of experimental products recovered after 12 days at −60 °C. Recovery was accomplished by freeze drying rather than quenching with NaOH solution (see Methods: Quenching Procedure and Analysis). a Run products are located on 400 µm glass spheres used in experiments. Scale bar is 200 µm b Magnified view of mineral grain identified with red box in 1A. Red cross indicates location of EDS measurement. Scale bar is 10 µm c Energy Dispersive X-ray Spectroscopy (EDS) data that show substantial enrichments in Mg and S consistent with the presence of a Mg-sulfate mineral
