Mt. Augustus (Burringurrah) is in the Gascoyne region of Western Australia, about 850 km from Perth, and 320 km east of Carnarvon. In terms of volume, it is the world's largest monolith. It is more than twice the size of Uluru. It is 8 km long and covers an area of 4795 hectares. Its summit has a small peak on a plateau, and rises about 717 m above a red, stony and sandy plain covered in arid scrubland. It is made of sedimentary rocks, Upper Proterozoic sandstone and conglomerate, originally deposited on an ancient sea floor about 1 000 million years ago, then later folded and uplifted. The rock has a variety of colours, ranging from purple, to pink, orange and red.