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Limestone pavement – Natural karst landform consisting of a flat, incised surface of exposed limestone. Mesa – Elevated area of land with a flat top and sides, usually much wider than buttes. Mushroom rock – Naturally occurring rock whose shape resembles a mushroom. Natural arch – Arch-shaped natural rock formation.
Paraná and Etendeka traps, Brazil, Namibia and Angola form 128 to 138 million years ago. 132 million years ago, a possible supervolcanic eruption occurred, ejecting 8,600 cubic kilometers (2,063 cu mi). [90] Formation of the Karoo-Ferrar flood basalts begins 183 million years ago.
Volcanism of Canada. Mount Edziza, a stratovolcano in northwestern British Columbia. A topographic map of Canada, showing elevations shaded from green (lower) to brown (higher) Volcanic activity is a major part of the geology of Canada and is characterized by many types of volcanic landform, including lava flows, volcanic plateaus, lava domes ...
The Canadian Shield (French: Bouclier canadien [buklje kanadjɛ̃]), also called the Laurentian Shield or the Laurentian Plateau, is a geologic shield, a large area of exposed Precambrian igneous and high-grade metamorphic rocks. It forms the North American Craton (or Laurentia), the ancient geologic core of the North American continent.
Western Europe. The Chaîne des Puys (French: [ʃɛːn de pɥi]; lit. 'Chain of the Puys ') is a north-south oriented chain of cinder cones, lava domes, and maars in the Massif Central of France. [1] The chain is about 40 km (25 mi) long, and the identified volcanic features, which constitute a volcanic field, [2] include 48 cinder cones, eight ...
A spatter cone is a low, steep-sided hill or mound that consists of welded lava fragments, called spatter, which has formed around a lava fountain issuing from a central vent. Typically, spatter cones are about 3–5 meters (9.8–16.4 ft) high. In case of a linear fissure, lava fountaining will create broad embankments of spatter, called ...
Notable volcanoes in Mexico include Popocatépetl, one of the country's most active and dangerous volcanoes, Pico de Orizaba (Citlaltépetl), the highest peak in Mexico, and Parícutin, a cinder cone volcano that famously emerged from a cornfield in 1943. Mexican volcanoes play a significant role in the country's geography, climate, and culture ...
The formation of the Pilanesberg occurred 2 billion years ago. As its zenith, the volcano towered to 7,000 metres in height. Over the time, a series of volcanic eruptions occurred. There were further outpourings of lava, craters collapsed, ring fracturing took place around the volcano and magma was squeezed into these fractures.