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Bon Irau
Bon Irau (Gunung Irau, Mount Irau), 2,501 m, is the highest peak of the Tamrau Mountains in Tambrauw Regency, Southwest Papua, Indonesia, an ultra-prominent summit with 1,900 m prominence, distinct from Malaysia's Mount Irau.
Bonneville
Bonneville names the largest closed basin of the Great Basin, Pleistocene Lake Bonneville (20,000 sq mi, over 1,000 ft deep), its catastrophic flood, and namesakes including Bonneville cutthroat trout and the Bonneville Power Administration.
Borah Peak (mountain, United States)
Borah Peak (Mount Borah), Idaho's highest mountain at 12,662 ft in the Lost River Range, an ultra-prominent Class 3 scramble via Chicken Out Ridge and site of Idaho's largest recorded earthquake, the 1983 magnitude 6.9 event.
Borborema Plateau
Borborema Plateau (Planalto da Borborema, Serra da Borborema), a plateau in northeastern Brazil across Pernambuco, Paraíba, and Rio Grande do Norte, part of the Borborema Province shield, averaging ~1,000 m elevation with peaks near 1,200 m and debated Cenozoic uplift mechanisms.
Borgora
Borgora, alternate name of Borohoro Shan (博罗科努山), a 5,248 m ultra-prominent peak (2,576 m prominence) in the Borohoro Mountains of the Tian Shan, Xinjiang, China; elevation from Soviet military maps.
Borohoro Mountains
Borohoro Mountains (Borohoro Shan, Borokhoro ula), a 250-km Tian Shan range in Xinjiang, China, up to 4,500 m, separating the Ili River basin from the Junggar Basin, with about 50 glaciers, Late Carboniferous Borohoro pluton bedrock, and a seismically active northern fold-and-thrust belt.
Bradyseism
Bradyseism, from Greek bradys (slow), is slow volcanic ground uplift and subsidence, best documented at Italy's Campi Flegrei caldera near Pozzuoli, with crises in 1970-72, 1982-84, and an ongoing phase since 2005.
Brandberg
Brandberg (Dâures, "burning mountain") is Namibia's highest mountain, a 2,573 m granite massif in the Erongo Region near Uis, formed 132-130 million years ago and holding over 45,000 San rock paintings, including the White Lady of Tsisab Gorge.
Bravo, Cerro
Cerro Bravo (Volcán Cerro Bravo) is an active, dormant dacitic stratovolcano and dome complex in Herveo, Tolima, Colombia, near Manizales; last erupted about 1720 CE, VEI 4–5 Plinian history, green alert.
Brazilian Highlands (dataran tinggi tengah)
Brazilian Highlands (Planalto Brasileiro, brasilianisches Bergland): Brazil's vast Precambrian upland system covering over 4 million km² across central, eastern, southeastern, and southern Brazil, including the Iron Quadrangle, Cerrado plateaus, and Paraná Basin plateaus.
Brian Boru Peak
Brian Boru Peak, a 2,507 m mountain in the Hazleton Mountains, Coast Mountains, British Columbia, highest summit of the Rocher de Boule Group with 1,832 m prominence, named for the Irish king Brian Boru.
Broad Peak
Broad Peak, situated in the Karakoram range on the Pakistan and China border, is the world's 12th-highest mountain. It was first climbed in 1957 by an Austrian team.
Brooks Range
Brooks Range: east-west mountain range across northern Alaska, northernmost extension of the Rocky Mountains, about 970 km long, highest point Mount Isto (2,735.6 m), formed by a Jurassic-Cretaceous fold-and-thrust orogeny.
Brugmann Mountains
Brugmann Mountains, or Monts Brugmann, are an 850 m mountain range on Liège Island, Palmer Archipelago, Antarctica, including Pavlov Peak and Mount Vesalius; discovered and named by the Belgian Antarctic Expedition (1897-1899) for patron Georges Brugmann.
Buckland Tableland
Buckland Tableland is a basalt plateau in central Queensland, Australia, on the Great Dividing Range, also mapped as the Buckland Basalts IBRA subregion. Oligocene hot-spot volcanism; flat-topped terrain reaching 1,100 m.
Bukit Raya
Bukit Raya (Gunung Bukit Raya), Central Kalimantan, is the highest peak of Indonesian Borneo at about 2,278 m, in Bukit Baka Bukit Raya National Park; distinct from Malaysian and Pekanbaru namesakes.
Buku Sibela
Buku Sibela (Gunung Sibela) is the highest peak of Bacan Island and of North Maluku province, Indonesia, about 2,085-2,111 m with equal prominence, in Gunung Sibela Nature Reserve, a young exhumed metamorphic block complex.
Bulu Kandela
Bulu Kandela (Buyu Kondorung) is a 2,870 m ultra-prominent mountain in Central Sulawesi, Indonesia, with 2,250 m prominence; first recorded ascent 27 October 2013 by Tadulako University students; distinct from the 855 m Buyu Kandela peak and from Katopasa.
Bulu Rantemario
Bulu Rantemario (Puncak Rantemario), summit of Gunung Latimojong in South Sulawesi, is Sulawesi's highest peak at 3,478 m (GPS about 3,440 m), a non-volcanic Seven Summits Indonesia highpoint climbed via the Karangan route.
Bureinsky Ridge
Bureinsky Ridge (Буреинский хребет), a mountain ridge in Khabarovsk Krai and Amur Oblast, Russian Far East, part of the Bureinsky Highlands west of the Amur, with Late Pleistocene glacial landforms and the Bureinskiy Nature Reserve.
Buttress Hill
Buttress Hill, a flat-topped Antarctic hill about 2,300 ft high with west-facing rock cliffs, overlooks Duse Bay in the northeast Antarctic Peninsula at 63°34'S, 57°03'W; named descriptively by the FIDS after their 1946 survey.
Caelius Mons
Caelius Mons, the Caelian Hill (Celio), the most south-easterly of Rome's Seven Hills; originally Querquetulanus, renamed for the Etruscan Caeles Vibenna; fire of A.D. 27, temple of Divus Claudius, Macellum Magnum.
Caichinque
Caichinque is a Pleistocene-Holocene stratovolcano complex (Volcano Number 355104) in Chile's Central Volcanic Zone, rising 4,458 m between Salar Capur and Salar Talar, with more than six andesitic-to-dacitic vents, no recorded Holocene eruptions, and uncertain age.
Cairn
Cairn: a human-made pile of stones (Irish carn), used from the Neolithic onward as burial monuments, chambered tombs such as Clava, landmarks, and modern hiking trail markers, distinct from earth-built tumuli.
Cairn Gorm
Cairn Gorm (Càrn Gorm, blue mountain) is a 1,245 m Scottish Highland mountain, Britain's sixth highest, in the Cairngorms National Park; home to a ski area, the £19.5m funicular railway (reopened 2025), and namesake of cairngorm quartz.
Calabozos
Calabozos is a 26 x 14 km late-Pleistocene caldera in the central Chilean Andes at 35.5°S, source of the Loma Seca Tuff ash flows (0.8, 0.3, 0.15 Ma, over 1,000 km3 total), with Holocene Descabezado Chico vents and a long-lived geothermal system.
Calanshio Sand Sea
Calanshio Sand Sea (سرير كلانشيو الرمال الكبير), also Calanscio Sand Sea, is a ~62,000 km² erg in eastern Libya running 500 km from Jaghbub and Jalo to Kufra, continuous with Egypt's Great Sand Sea, with north–south seif dunes over 110 m high.
Cambrian Mountains
The Cambrian Mountains are the upland plateau spine of mid Wales between Snowdonia and the Brecon Beacons, highest at Pumlumon (752 m), source of the Severn, Wye, Teifi, and Tywi, nicknamed the Green Desert of Wales.
Canadian Prairies
Canadian Prairies: grassland plains of Alberta, Saskatchewan, and Manitoba between the Rockies and the Canadian Shield; continental climate, 1,800 km span, major grain-farming region with heavy native grassland loss and recurring drought.
Canadian Rockies
Canadian Rockies: sedimentary, thrust-faulted eastern segment of the Canadian Cordillera, over 1,500 km from the Yukon–BC border into Montana; shaped by Laramide thrusting and 55–60 million years of erosion, with rapidly retreating glaciers.