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Karatau Mountains
Karatau Mountains (Қаратау, Black mountains): a NW-SE Paleozoic mountain range in southern Kazakhstan between the Syr Darya and Chu-Sarysu basins, up to 2,173 m at Bessaz Peak, noted for Jurassic fossils, 123 endemic plants, and the Karatau argali reserve.
Karelin Islands
Karelin Islands (Islas Uribe, Spanish Karelin, islotes) are small Antarctic islands at 65°35'S 65°35'W in the Biscoe Islands area, east of Renaud Island, near Grandidier Channel.
Karisimbi
Karisimbi, also Mount Karisimbi, is the tallest Virunga stratovolcano on the DR Congo-Rwanda border, about 4,490-4,507 m, highest point of Rwanda, dormant since roughly 8050 BCE with potassic basanite-to-trachyte lavas.
Karla Caves
Karla Caves, also Karle Caves, near Lonavala, Maharashtra: Buddhist rock-cut complex whose Cave 8 Great Chaitya Hall, about 45 m long with 37 octagonal columns and 2,000-year-old wooden roof ribs, is among India's largest chaityagrihas.
Karoo
The Karoo is an arid region of South Africa's Eastern, Western, and Northern Cape provinces, about 395,000 km2, divided into Great and Little Karoo by the Swartberg range; it also names the Karoo Supergroup and Basin, famed for Permian-Triassic fossils.
Karpinsky Ice Cap
Karpinsky Ice Cap (Ледник Карпинского), also Karpinskiy Ice Cap, is a roughly 2,378 km² ice cap on October Revolution Island, Severnaya Zemlya, Russia; the Russian Arctic's third largest glacier complex, feeding Issledovateley Glacier and the Matusevich Ice Shelf.
Karst flow system
A karst flow system, also called a springshed, is the drainage area that feeds water through dissolved conduits in soluble rock and discharges it at springs.
Karst Plateau
Karst plateau: elevated soluble-rock terrain (Kras/Carso between Slovenia and Trieste, the type locality) shaped by dissolution, with sinkholes, caves, sinking streams, large springs, scarce surface water, and distinctive land-use constraints.
Karst regions of the world
Karst regions of the world: landscapes and aquifers dissolved from limestone and dolomite, covering about 15% of land, concentrated in South China, the Dinaric Karst, and the Caribbean, supplying water to nearly 20% of people.
Karst spring
Karst spring: a concentrated groundwater discharge point in soluble rock (limestone, dolomite, gypsum), also called vauclusian spring or resurgence. Conduits carry 75-96% of flow; springs supply water across karst regions covering ~15% of land.
Karst Underwater Research
Karst Underwater Research is an American volunteer nonprofit that explores, maps, and documents Florida's underwater caves and springs, begun in 1993 as the Sulphur Springs diving project in Tampa.
Karstveld Sink Holes
Karstveld Sink Holes (FEOW ecoregion 554) is a Namibian freshwater ecoregion of dolomite karst southeast and east of Etosha Pan, containing Dragon's Breath Cave, Lake Otjikoto, Lake Guinas, and endemic cavefish such as Clarias cavernicola.
Karthala
Karthala (Mount Karthala) is an active basaltic shield volcano, 2,350 m, forming the southern two-thirds of Grand Comore (Ngazidja) Island, Comoros, with a 3.5 x 2.8 km summit caldera, eruptions every 6-8 years, and a last eruption in January 2007.
Karun Kuh
Karun Kuh, also known as Karun Koh, is the culminating summit of the Karun Kuh group of the Ghujerab Mountains in Pakistan's northern Karakoram, first ascended in 1984 by an Austrian expedition.
Kashmir Valley
Kashmir Valley: intermontane Himalayan basin in northern India, drained by the Jhelum, centered on Srinagar; known for Karewa geology, horticulture (apples), handicrafts, tourism, flood and water stress.
Katanga Plateau
Katanga Plateau, high plateau (914–1,829 m) in southeastern DR Congo bounding the Congo Basin; underlain by the Katanga Supergroup and hosting the copper-cobalt Central African Copperbelt.
Kathiawar
Kathiawar, also known as Saurashtra, is a peninsula in southwestern Gujarat, India, bounded by the Arabian Sea, the Gulf of Khambhat, and the Ranns of Kachchh, and home to Gir National Park's wild lions.
Katholm
Katholm: name of a 5-6 ha privately owned bird islet in Augustenborg Fjord near Als, Denmark; a Renaissance manor near Grenaa; Limfjord spits; and an island in Vårdö, Åland.
Katmai
Katmai (Mount Katmai) is a 2,047-m stratovolcano in Katmai National Park, Alaska, whose summit collapsed into a 3 x 4 km caldera during the 1912 Novarupta eruption, the twentieth century's largest.
Kauai
Kauai (Kauaʻi), oldest of the main Hawaiian Islands, a volcanic island whose volcanism ended about 3.8 million years ago; fourth largest, 73,298 residents (2020), home to Waimea Canyon and the Na Pali coast cliffs.
Kaumana Cave
Kaumana Cave is a lava tube on the Island of Hawaii, formed during the 1880–81 Mauna Loa eruption, with its entrance in Kaumana County Park near Hilo.
Kavir & Lut Deserts
Kavir & Lut Deserts: Iran's two great interior deserts, Dasht-e Kavir (Great Salt Desert, ~77,000 km²) and Dasht-e Lut (~51,800 km²), endorheic basins on the Iranian Plateau, with the Lut holding record land-surface temperatures of 70.7–80.8°C and World Heritage kalut yardangs.
Kawagebo
Kawagebo (Kawagarbo, 卡瓦格博, Tibetan ཁ་བ་དཀར་པོ) is the 6,740 m highest peak of Yunnan's Meili Snow Mountains. Never climbed; a 1991 avalanche killed 17 climbers, and local law has banned mountaineering since 2001.
Kawarani
Kawarani (卡瓦洛日, ཁ་བ་ལུང་རི, Kawaluo Ri) is a sacred twin-summit peak, 5,992 m and 5,928 m, in the Gongkala Mountains of Ganzi, Sichuan, China; first climbed in 2014 by Marcos Costa and Bruce Normand after years of access blocks by local monks.
Kazakh Steppe
Kazakh Steppe (Kirghiz steppe): vast dry grassland of about 804,500 km² across Kazakhstan, from the Caspian Sea to the Altai Mountains; homeland of nomadic pastoralism, later ploughed under Soviet agriculture, now partly conserved at Saryarka.
Kazakh Uplands
Kazakh Uplands (Saryarqa, Сарыарқа), also Kazakh Melkosopochnik: eroded peneplain of low mountain ranges in central and eastern Kazakhstan, 300–1,565 m elevation, Paleozoic folded geology, steppe and semi-desert vegetation, UNESCO Saryarka site.
Kazumura Cave
Kazumura Cave, on Kilauea's east flank, Hawaii, is the world's longest and deepest lava tube: 65.5 km surveyed, 1,101.5 m deep, formed by the 15th-century 'Aila'au eruption, with skylight entrances and private tours.
Kebnekaise
Kebnekaise (Giebnegáisi), Sweden's highest mountain in Kiruna Municipality, Lapland. Two summits: bare-rock North Peak 2,096.8 m, highest point since 2019; glaciated South Peak measured 2,088.3 m in 2026.
Keele Peak
Kee Peak, in the Selwyn Mountains of Yukon, Canada, is a summit of the Mackenzie Mountains named for Joseph Kee, a Geological Survey of Canada geologist.
Kegueur Terbi
Kegueur Terbi (also Chegor Tedi, Emi Hessi, Kegueur Tedi) is a mountain in Tibesti Region, Chad, elevation 2,827 m at 21.41667°N, 18.7°E, ranked 5th of 26 Chad peaks by World Measure.