Sol 5042, March 31, 2018. San Juan Pueblo is the name of the target Opportunity is now examining. Its rocks show vesicles — hollow voids — that are found commonly with volcanic rocks that form when gas-rich magma reaches the surface. The gas produces bubbles in the magma before it cools and hardens into rock. How this relates to the geological history of Endeavour Crater remains to be seen.
At right is a front Hazcam view showing the outcrop, which extends upslope in a roughly linear direction. Above is a composite of false-color Pancam frames (Holger Isenberg) showing the nearest part of the outcrop. Click either image to enlarge it.