marsgypsum

This solid vein of white mineral near Endeavour crater, up to 2 centimeters thick, has every appearance of the well-known mineral gypsum. NASA/JPL-Caltech/Cornell/ASU image.

This solid vein of white mineral near Endeavour crater, up to 2 centimeters thick, has every appearance of the well-known mineral gypsum. NASA/JPL-Caltech/Cornell/ASU image.

Download Original: 640 × 360 A Most Earthly Mineral on Mars