Murujuga, formerly known as Dampier Island and today usually known as the Burrup Peninsula, is an area in the Dampier Archipelago, in the Pilbara region of Western Australia, containing the town of Dampier. The Dampier Rock Art Precinct, which covers the entire archipelago, is the subject of ongoing political debate due to historical and proposed industrial development. Over 40% of Murujuga lies within Murujuga National Park, which contains within it the world's largest collection of ancient 40,000 year old rock art (petroglyphs). The region is sometimes confused with the Dampier Peninsula, to the north-east. Most Murujuga rock art is on 2.7 billion year old igneous rocks. The rock art was made by etching away the outer millimetres of red-brown iron oxide, exposing pale centimetre-thick weathered clay. The underneath very hard igneous rock is dark grey-green coloured, and composed of granophyre, gabbo, dolerite, and granite. The traditional owners of the Murujuga are an Aboriginal nation known as the Yaburara (Jaburara) people. In Ngayarda languages, including that of the Yaburara, murujuga means "hip bone sticking out". Between February and May 1869 a great number of Yaburara people were killed in an incident known as the Flying Foam Massacre. The five clans who took over the care of the land as traditional custodians following the massacre include Yaburara, Ngarluma, Mardudhunera, Yindjibarndi and Wong-Goo-Tt-Oo peoples. First given the English name Dampier Island after the English navigator William Dampier (1651–1715), it was then an island lying off the Pilbara coast. In 1963 the island became an artificial peninsula when it was connected to the mainland by a causeway for a road and railway. In 1979 Dampier Peninsula was renamed Burrup Peninsula after Mt Burrup, the highest peak on the island, which had been named after Henry Burrup, a Union Bank clerk murdered in 1885 at Roebourne. The peninsula is a unique ecological and archaeological area since it contains the Murujuga cultural landscape, the world's largest and most important collection of petroglyphs.