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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]
The Xiaozhai Tiankeng is 626 meters (2,054 feet) long, 537 meters (1,762 feet) wide, and between 511 and 662 meters (1,677 and 2,172 ft) deep, with vertical walls. Its volume is 119,349,000 m³ and the area of its opening is 274,000 m 2. This material has been dissolved and carried away by the river.
Hranice Abyss. Hranice Abyss (Czech: Hranická propast) is the deepest flooded pit cave in the world. It is a karst sinkhole near the town of Hranice, Czech Republic.The greatest confirmed depth is 519.5 m (1,704 ft), of which 450 m (1,476 ft) is underwater.
Scientists using an ocean drilling vessel have dug the deepest hole ever in rock from Earth's mantle - penetrating 4,160 feet (1,268 meters) below the Atlantic seabed - and obtained a large sample ...
Dean's Blue Hole is the third-deepest blue hole in the world, with a depth of 663 feet. ... It formed more than 15,000 years ago and is enclosed by three sides of "natural rock amphitheater" and a ...
The difference in elevation of the highest cave entrance (Arbaika) and its deepest explored point is 2,199 ± 20 metres (7,215 ± 66 ft). [2] It became the deepest known cave in the world in 2003 when the Ukrainian Speleological Association reached a depth of 1,910 m (6,270 ft).
The World’s Deepest Holes Can Fight Climate Change ThomasVogel - Getty Images Tapping into the energy content of heat stored underground would meet the world’s energy needs.
The cosmic ray rate in the laboratory is under 0.2 muons/m 2 /day, [5] placing the lab at a depth of 6720 m.w.e. [6]: 2 and making it the best-shielded underground laboratory in the world. [ 7 ] : 17 The actual depth of the laboratory is 2,400 m (7,900 ft), yet there is horizontal access so equipment may be brought in by truck.