https://science.nasa.gov/photojournal/sandstone-target-windjana-may-be-next-martian-drilling-site/
Sandstone Target 'Windjana' May Be Next Martian Drilling Site - NASA Science
Apr 25, 2014 - NASA's Curiosity Mars rover has driven within robotic-arm's reach of the sandstone slab at the center of this view.
may besandstonetarget