For mission planners, Taurus-Littrow valley was a crossroads of lunar history: The floor was covered in dark volcanic rocks, but boulders and lighter material that had fallen from the surrounding mountains offered access to ancient highland material. Gene Cernan and Harrison Schmitt spent a total of 75 hours in the sunlit valley of Taurus-Littrow. Of that, 22 hours and four minutes were in extravehicular activity. The crew covered 19 miles (30.5 km) in the lunar rover and gathered 243 pounds (110.4 km) of samples. All are records.