Karoo Supergroup of the country, and in the Lebombo mountains along the Mozambique border. Once the layer of hard lava was eroded away, the softer Karoo sediments over the rest of the basin eroded even faster. However, the dolerite sills resisted erosion, protecting the softer Beaufort and Ecca shales beneath them. This created numerous and widespread flat topped hills, known as Karoo Koppies ("koppie" being the Afrikaans term for hill), which are iconic of the Karoo, and, by extension, the South African landscape. The dykes, or vertical fissures which brought the lava to the surface stand out today as linear ridges extending
Central Desert Region across four wards: Towns, with population figures as of Census of 2006: Central Desert Region The Central Desert Regional Council is a local government area of the Northern Territory, Australia. The Council's main towns are Ti Tree, Yuendumu and Lajamanu. The Region covers an area of and had a population of over 3,500 people as at the 2016 Census. In October 2006 the Northern Territory Government announced the reform of local government areas. The intention of the reform was to improve and expand the delivery of services to towns and communities across the Northern Territory by establishing eleven new Shires.