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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]
Nebraska hydrogeology is known through extensive irrigation well drilling for agriculture. In the early 1990s, a USGS study focused on Shelton, Nebraska and the Platte River found Holocene and Pleistocene sand and gravel deposits interbedded with clay and silt between 45 and 100 feet thick, overlying other Quaternary silt deposits between 10 ...
This list of deepest mines includes operational and non-operational mines that are at least 2,224 m (7,297 ft), which is the depth of Krubera Cave, the deepest known natural cave in the world. The depth measurements in this list represent the difference in elevation from the entrance of the mine to the deepest excavated point.
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 ...
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The Kimberley Mine or Tim Kuilmine [1] (Afrikaans: Groot Gat) is an open-pit and underground mine in Kimberley, South Africa, and claimed to be the deepest hole excavated by hand, although this claim is disputed by Jagersfontein. [2]
the deepest boreholes (Core drill, for geological exploration), and; the longest boreholes ( Extended Reach Drilling , for oil production). Pages in category "Deepest boreholes"
Correction: August 23, 2024 — An earlier version of this story misstated how quickly the drill dug into the seabed. It took three days to get to 200 meters, then an additional 5 days to get to ...