From Emily Lakdawalla’s blog at The Planetary Society: This is going to be a rather short update about a rather long period of Curiosity’s Mars exploration. Its posting was delayed a bit due to my travel to the Division for Planetary Sciences meeting last week. Since my last update, Curiosity has accomplished the fastest back-to-back pair of drill-and-sample operations of the entire mission, by a long shot.
There are now two new holes in Mars, drilled only 18 sols and just a meter or two apart. The first, Big Sky, sampled the Stimson unit on which Curiosity is now driving. The second, at Greenhorn, was also in the Stimson unit, but this one was within one of the bright haloes around the fractures that criscross Stimson. Here are all of Curiosity’s drill holes to date… And here [image above] are the two most recent drill holes. Big Sky was drilled on sol 1119 (September 29, 2015), and Greenhorn on sol 1137 (October 18,2015). [More at link]