2,436 articles
G-Land
G-Land (Plengkung, Grajagan Bay) is a world-class left-hand reef point break at Java's southeastern tip in Alas Purwo National Park, Indonesia. Sections Kongs, Money Trees, Launching Pads, Speedies; season April–October; discovered 1972; first surf camp 1974.
Gakkel Ridge
Gakkel Ridge: ultraslow-spreading Arctic mid-ocean ridge, northern continuation of the Mid-Atlantic Ridge, spreading 14 to under 8 mm/yr, with thin crust, abundant hydrothermal vents, and deep explosive volcanism.
Gambie-Koulountou
Gambie-Koulountou (Ramsar Site 1578) is a 368,193-hectare wetland in Boké region, Guinea, on the Senegal border, covering the Koulountou River floodplain, the Gambia River's main tributary, designated 14 November 2005.
Gan
Gan (赣江, Ganjiang) is Jiangxi Province's largest river, a 766 km Yangtze tributary via Poyang Lake, draining about 82,000 km², supplying most of the lake's water and sediment, and anchoring Jiangxi's shipping and water management.
Gandaki River (गण्डकी नदी)
The Gandaki River (गण्डकी नदी), called Narayani in Nepal and Gandak in India, is a major transboundary river rising in the Himalayas and joining the Ganges on its left bank.
Ganges
The Ganges (Ganga) is a 2,495 km Himalayan river flowing to the Bay of Bengal, sacred to Hindus, supporting over 400 million people, and the focus of India's Namami Gange cleanup program.
Ganges Delta & Plain
Ganges Delta & Plain, FEOW freshwater ecoregion 709, spans Bangladesh, India, and Nepal from New Delhi to the Ganges Delta, with 11 endemic fish species, within the world's largest delta facing subsidence and sea-level rise.
Ganges Himalayan Foothills
Ganges Himalayan Foothills (FEOW ecoregion 710): Indo-Malay montane freshwater ecoregion on the southern Himalayan slope of the Ganges basin in India, Nepal, and China, with 11 endemic fish species, delineated by topography and climate, draining to the Bay of Bengal.
Garabogazköl
Garabogazköl (Kara-Bogaz-Gol), shallow hypersaline lagoon east of the Caspian Sea in Turkmenistan; about 35% salinity, 3.5 m max depth, major mirabilite (sodium sulfate) source; dammed 1980, dam removed 1992.
Gardner Inlet
Gardner Inlet, also called Bahía Gardner or Ensenada Gardner, is an ice-filled inlet between Cape Adams and Cape Schlossbach on the Lassiter Coast, Palmer Land, Antarctica, discovered by RARE in 1947 and named for physicist Irvine Clifton Gardner.
Garibaldi Lake
Garibaldi Lake: glacier-fed alpine lake in Garibaldi Provincial Park, BC, north of Squamish, dammed by The Barrier lava dam; 9 km hike from Rubble Creek; reservations required.
Garry
Garry Lake, an official lake name in Nunavut, Canada (65°58′N 100°18′W), monitored by DAHITI satellite altimetry since 2002; also Gary Lake, Nova Scotia, and Garrow Lake, Cornwallis Island.
Gavkhouni (گاوخونی)
Gavkhouni (گاوخونی), also Gavkhuni or Gavkhooni, is a shallow saline Ramsar wetland (476 km2, designated 1975) east of Isfahan, Iran, terminal to the Zayandeh-Rud River, now almost completely dry from over-abstraction and drought.
Gdańsk Bay
Gdańsk Bay (Zatoka Gdańska), a southeastern bay of the Baltic Sea in the Gdańsk Basin, receives the Vistula, hosts the ports of Gdańsk and Gdynia, includes shallow Puck Bay behind the Hel Peninsula, and averages 70 m deep.
Genale
Genale (Ganale, Genale Dorya) is a river rising in Ethiopia's Mendebo Mountains, flowing southeast to Dolo on the Somalia border where it joins the Dawa to form the Juba; it drains Ethiopia's third-largest basin, about 171,000 km², with 5.8–6 billion m³ annual flow and the 254 MW Genale Dawa III dam.
General Bathymetric Chart of the Oceans
The General Bathymetric Chart of the Oceans (GEBCO) is an international program producing free maps of the world's ocean floor, run jointly by the IHO and UNESCO's IOC.
General Carrera/Buenos Aires
General Carrera Lake (Lago Buenos Aires, originally Chelenko) is a 1,850 km2 glacial-tectonic lake on the Chile-Argentina border, the largest in Chile, draining via the Baker River, home of the Marble Caves.
Geographe Bay
Geographe Bay is a north-facing bay in southwest Western Australia, named by Baudin's 1801 expedition. It has 50 km of arcuate sandy beach, temperate WA's most extensive seagrass meadows, and lies in the Ngari Capes Marine Park.
George VI Sound (landform)
George VI Sound: flooded block-faulted rift valley between Alexander Island and Palmer Land, Antarctic Peninsula, covered by George VI Ice Shelf; over 800 m deep, filled with warm Circumpolar Deep Water, discovered 1935 by Ellsworth.
Georgian Bay
Georgian Bay (Baie Georgienne) is the 15,111 km² northeastern arm of Lake Huron, Ontario, separated by Manitoulin Island and the Bruce Peninsula, with a 30,000-island archipelago and oligotrophic, Fair-to-Good rated waters.
Geothermal areas of Yellowstone
Geothermal areas of Yellowstone: about 120 thermal areas in Yellowstone National Park holding over 10,000 hot springs, geysers, mudpots, and fumaroles, including half of Earth's active geysers, heated by a magma chamber 5 to 10 miles below the surface.
Geren Cuo
Geren Cuo (格仁错, Kering Tso, Kyaring Lake) is a 475.9 km2 endorheic lake at 4,650 m in Xainza County, Nagqu, Tibet, part of the Siling Co lake system along the Gyaring Co Fault, a black-necked crane habitat.
Gerlache Strait
Gerlache Strait, also known as Belgica Strait, is a channel about 200 km long separating the Antarctic Peninsula from the Palmer Archipelago, first charted by the Belgian Antarctic Expedition in 1898.
German auxiliary cruiser Atlantis
German auxiliary cruiser Atlantis (HSK 2, Schiff 16, Raider-C), ex-cargo ship Goldenfels commanded by Bernhard Rogge; sank or captured 22 ships of 145,697 tons in 622 days before being sunk by HMS Devonshire in 1941.
Geyser eruptive mechanics
Geyser eruptive mechanics is the study of how geysers work: the subsurface reservoirs, constricted conduits, and boiling processes behind their periodic eruptions of water and steam.
Geyser types
Geyser types are the two classes of Earth's geysers: fountain geysers, which erupt from pools, and cone geysers, which erupt from mounds of siliceous sinter called geyserite.
Geysir
Geysir (Great Geysir) is the famous geyser of Haukadalur, South Iceland, whose name gave English the word "geyser"; first recorded in the 13th century, historically erupting up to 70 m, now mostly dormant beside the active Strokkur.
Ghaggar-Hakra River
The Ghaggar-Hakra River is an ephemeral India-Pakistan river whose paleochannel was a former Sutlej course, abandoned 11-8 ka, later sustaining monsoon-fed Harappan settlements and identified by many with the Vedic Sarasvati.
Gibson Bay
Gibson Bay, Antarctica: a bay at 63°19'S 55°52'W near Joinville Island on the Antarctic Peninsula's Weddell Sea side, a UK-approved name listed in the Australian and U.S. Antarctic gazetteers; distinct from Gibson Bay, Nunavut.
Gila (landform)
Gila River, from Yuma "Hahquahsaael" via Spanish "Xila": major Southwest river rising in New Mexico's Gila National Forest, joining the Colorado at Yuma; Huhugam canals, Coolidge Dam (1928), 1935 Gila Decree, severe 2026 drought.