The Mars Curiosity rover has returned a mosaic image of mineral veins and outcroppings underneath a three-foot-tall ridge of black-appearing cap rock on lower Mount Sharp.

The Mars Curiosity rover has returned a mosaic image of mineral veins and outcroppings underneath a three-foot-tall ridge of black-appearing cap rock on lower Mount Sharp. 
In the center of the image, recently released by NASA, is the "Garden City" where those veins were studied by the rover in March 2015. 
NASA notes, "For geologists, the vein complex offers a three-dimensional exposure of mineralized fractures in a geological setting called the Pahru