The cover photo illustrates Clusters of gypsum crystals growing
in reddish muddy sediments in the southern sector of the Salar de
Pocitos (Southern Puna), Salta Province, Argentina.The image shows
the formation of prismatic gypsum crystals resulting from extreme
evaporation in a saline-ephemeral lacustrine environment. In the
background, aeolian landforms and salt crusts of the salar can be
observed. Photo by Geologist Alejandro Miguel Ali.