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The Kola Superdeep Borehole SG-3 (Russian: Кольская сверхглубокая скважина СГ-3, romanized: Kol'skaya sverkhglubokaya skvazhina SG-3) is the deepest human-made hole on Earth (since 1979), which attained maximum true vertical depth of 12,262 metres (40,230 ft; 7.619 mi) in 1989. [1]
Its name means deep water in the Mayan language and, at over 420 metres (1,380 ft) deep, it is the deepest known blue hole. [1] Blue holes generate a distinctive blue color when seen from above and are typically only a few dozen meters deep. It was discovered in about 2003 by a local diver who followed a grouper that went into its mouth. The ...
Dean's Blue Hole is a blue hole located in The Bahamas in a bay west of Clarence Town on Long Island and is the world's third deepest with a depth of 202 metres (663 ft), after the Taam Ja' Blue Hole in the Chetumal Bay and the Dragon Hole in the South China Sea. [1]
This hard-to-find rusty cap in the ruins of a building in Russia's Kola Peninsula covers the deepest hole on earth. The scientists drilled it off and on for 24 years from 1970 to 1994. They got ...
Dragon Hole is about 100 metres (330 ft) deeper than Dean's Blue Hole in the Bahamas. There are several fresh water sinkholes on land that are deeper than Dragon Hole. These include Mexico's Zacatón (335 metres (1,099 ft)), Pozzo del Merro in Italy (392 metres (1,286 ft)) [4] [5] and Hranice abyss in the Czech Republic (404 metres (1,325 ft)).
Scientists plan to explore Dean’s Blue Hole, one of the deepest blue holes, using advanced technology to uncover its mysteries and potential human remains. Scientists Are Planning on Plunging ...
the deepest boreholes (Core drill, for geological exploration), and; the longest boreholes (Extended Reach Drilling, for oil production).
Blue Hole (Red Sea) – a submarine sinkhole around 94 m (308 feet) deep in east Sinai, a few kilometres north of Dahab, Egypt on the coast of the Red Sea. Dead Sea sinkholes Dean's Blue Hole – the world's second deepest known salt water blue hole with an entrance below the sea level; in the Bahamas