The Kola Superdeep Borehole was just 9 inches in diameter, but at 40,230 feet (12,262 meters) reigns as the deepest hole. Not to be defeated, the researchers abandoned the previous borehole and began again from a depth of 23,000 feet. By continuing to use our website you consent to all cookies in accordance with our cookie policy. The project attempted to drill as deep as possible into the Earth's crust. And, the higher the heat, the more liquid the environment, and the harder to maintain the bore, said Andrews. However, we know more about certain distant galaxies than we do about what lies miles beneath our very own feet. By then, it was 1992 – 22 years after drilling had first begun. For two decades it was also the world's longest borehole in terms of measured depth along the well bore, until it was surpassed in 2008 by the 12,289-metre-long (40,318 ft) Al Shaheen oil well in Qatar. For instance, the marine snow that the researchers saw beneath the Antarctic was, according to the University of Southampton’s Dr. Jon Copley, “thicker than [he’s] seen it anywhere else in the world’s oceans.” But what is marine snow, and why is it so important to life on the seafloor? And bizarrely, as the drill inched closer and closer to Earth’s center, a completely unexpected change occurred. The borehole is 23 centimetres (9 in) in diameter. It’s a stretch of sea surrounded by chunks of shifting ice; some of these pieces are roughly the size of a motor vehicle, while others cover half a square mile. It took almost 20 years to reach that 7.5-mile depth—only half the distance or less to the mantle. Continue For instance, in a literal plunge into the unknown, a two-man submersible was dropped into the cold waters of the Antarctic on a mission of discovery. The Kola Superdeep Borehole is 23 centimeters (about 8.7 inches) in diameter and its metal lid is welded on so it is unlikely that anyone would ever fall down it. The borehole is 23 centimetres (9 in) in diameter. As a result, it reacted with the higher temperatures in strange and unpredictable ways. Indeed, we’ve managed to map the surfaces of Mars in greater detail than the floors of the seas that surround us. Part of the reason the project — named the “Kola Superdeep Borehole” — wasn’t widely known at the time was because the former Soviet Union initially supervised the operation (located within Russia’s Kola Peninsula), and some details were likely kept under wraps. The Kola Superdeep Borehole (Russian: Кольская сверхглубокая скважина, romanized: Kol'skaya sverkhglubokaya skvazhina) is the result of a scientific drilling project of the Soviet Union in the Pechengsky District, near the Russian border with Norway, on the Kola Peninsula. The project was officially terminated in 1995, due to the dissolution of the Soviet Union, and the site has since been abandoned. Essentially, marine snow is organic material that flows from the upper part of the ocean down to the floor. Well, beneath the waves they discovered an amazing ecosystem of strange creatures, including one that they named after a key component of the Star Wars movie series. Another strange creature living in the Antarctic Ocean is the ice dragonfish, or Cryodraco antarcticus, which has adapted in an extraordinary manner to survive in the incredibly cold conditions. [18], "Kola Superdeep" redirects here. The Americans never got to the mantle. In contrast, the average depth of the ocean is just over 12,000 feet, which is around two miles. With this milestone achieved, researchers on the Kola Peninsula temporarily downed tools. With a depth of 12,262 metres (40,230 ft), it has been since 1989 the deepest artificial point on Earth. The Deepest Man-Made Hole Ever Created Was Sealed Up And Abandoned – Due To An Astonishing Event In 1983, the drill passed 12,000 m (39,000 ft), and drilling was stopped for about a year for numerous scientific and celebratory visits to the site. Their goal was simple: to penetrate as far as possible into the planet’s crust.