Uluru / Australia

Uluru (Ayers Rock) is one of Australia's most recognisable natural icons. The world-renowned sandstone formation stands 348 m high above sea level with most of its bulk below the ground, and measures 9.4 km in circumference. Uluru appears to change color as the different light strikes it at different times of the day and year.

Uluru is an inselberg, literally "island mountain", an isolated remnant left after the slow erosion of an original mountain range. Uluru is also often referred to as a monolith, although this is a somewhat ambiguous term that is generally avoided by geologists. The remarkable feature of Uluru is its homogeneity and lack of jointing and parting at bedding surfaces, leading to the lack of development of scree slopes and soil. These characteristics led to its survival, while the surrounding rocks were eroded. For the purpose of mapping and describing the geological history of the area, geologists refer to the rock strata making up Uluru as the Mutitjulu Arkose, and it is one of many sedimentary formations filling the Amadeus Basin