Sol 3948, March 3, 2015. Opportunity has rolled up to an outcrop named for Charles Floyd, an explorer with the Lewis and Clark Expedition (and the only member who died on the trip).
Pancam false-color images by Holger Isenberg reveal the rock differences. Below: a Pancam close-up.
Opportunity raw images, its latest mission status, a location map. and atmospheric opacity, known as tau.