series of granite hills, northwestern South Australia, running parallel to the Northern Territory border for 130 miles (210 km). Their bare rock surfaces rise to numerous peaks exceeding 3,500 feet (1,100 m), including Mount Woodroffe (4,708 feet 【1,435 m】), the state's highest point. Sighted in 1873 by the English explorer William C. Gosse and crossed in that year by Gosse and Ernest Giles, the hills were named for Sir Anthony Musgrave, then lieutenant governor of South Australia. In the mid-1980s much of the area was the subject of an Aboriginal land-rights claim, the ranges having been traditionally a place of initiation for the Pitjantjatjara Aborigines.