Editing Kanangra-Boyd National Park (section)

===Geology===
The Kanangra-Boyd Wilderness is among the largest and most rugged wilderness areas in New South Wales. Situated to the south of {{NSWcity|Katoomba}} in the Blue Mountains and the Kanangra-Boyd National Parks, this folded belt or "Rim Rock" area is markedly different from the [[Permian|Permo]]-[[Triassic]] [[Sydney sandstone|sandstone]] dominated landforms which comprise the rest of the Blue Mountains. There are isolated residual cappings of Permian sandstone in a few places but here the [[Palaeozoic]] basement rocks, which are elsewhere buried well below the Permo-Triassic Measures, are on the surface as high land. Rock types include quartzite, diorite, Devonian rhyolites, rhyo-dacites, Silurian phyllites, slates, siltstones and tuff limestones. The Boyd Plateau comprises a dome of Devonian granite intruded into Devonian quartzites and sedimentaries. There are also intrusive igneous rocks from the Carboniferous period. Kanangra Tops at the south-eastern end of the Plateau is one of the Permian outliers. Its fringing [[Fault (geology)|fault scarp]] – Kanangra Walls – comprises Permian sedimentaries of the Capertee Group which rests unconformably on a Devonian Lambie Group Basement. Nearby Kanangra Gorge is cut {{convert|600|-|900|m}} deep in rocks of the Lambie Group, and is one of Australia's deepest gorges. Cloudmaker and Guouogang are eroded remnants of [[Ordovician]] quartzite. Further east, in the Coxs River area, is the large Kanimbla granite batholith, emplaced during the Carboniferous period. Colong Caves is another outstanding feature of the area. The main Upper Silurian limestone belt, in the [[Jenolan River]] valley to the north-west, is {{convert|300|m}} thick, {{convert|8|km}} long and located in a valley {{convert|460|m}} deep. This karst topography, created by the Jenolan and its tributaries, is one of the least understood in Australia.<ref name=colong>{{cite web |url=http://www.colongwilderness.org.au/archive/RedIndex/NSW/kanang99.htm |title=Kanangra-Boyd Wilderness|work=NSW Wilderness Red Index |publisher=The Colong Foundation for Wilderness|year=1999 |access-date=24 December 2013 }}</ref>