Big Sky and Greenhorn drill sites, Stimson unit, Curiosity sol 1142
Curiosity drilled at two sites on sols 1119 and 1137: Big Sky (right side) and Greenhorn (left side). Big Sky is in the middle of a typical exposure of the Stimson unit. Greenhorn is located very close to a vein, a location enriched in silica. By drilling these two sites close to each other, the Curiosity team hoped to understand the geologic process responsible for silica enrichment in the area. The photos for this mosaic were captured on October 23, 2015.