science.nasa.gov/photojournal/nasas-curiosity-captures-dawn-breaking-on-wind-carved-cliffs NASA’s Curiosity Captures Dawn Breaking on Wind-Carved Cliffs
On sol 4,982, Curiosity caught sunrise hitting wind-carved yardangs on Mount Sharp, a layer that may mark a gap in the mountain's climate record where erosion once struck. One theory: it's ancient volcanic ash, and the rover skipped its usual white-balancing to capture the scene as dawn actually looked.
— via NASA Breaking News