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
Monegros Desert Monegros Desert The Monegros Desert or Desierto de los Monegros is a semidesert in Aragón, northeastern Spain, spanning the provinces of Zaragoza and Huesca. It is a semi arid zone prone to frequent droughts. It is noted for its annual electronic music festival held in mid-July, the Monegros Desert Festival. The Monegros Desert spans the provinces of Zaragoza and Huesca in the region of Aragón, including the "comarca" of Monegros in Huesca. Part of the desert lies in the Ebro Valley. The desert covers about and consists of 49 villages in 31 municipalities. The highest point of the Monegros Desert