The Kola Superdeep Borehole was begun in 1970 and finished in
1992. It reached 12,262 meters deep. Work ceased due to the
difficulties of drilling in extreme temperatures (~300 degrees
Celsius) and lack of funding.
The Kola Superdeep Borehole was begun in 1970 and finished in
1992. It reached 12,262 meters deep. Work ceased due to the
difficulties of drilling in extreme temperatures (~300 degrees
Celsius) and lack of funding.
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It is more than 4 thousand feet approx 7.3 miles deep
As of 2003 it is the deepest active borehole at 8,578 m (28,143 ft) and with a 214 mm (8.4 in) diameter.
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Geologists study geology, the relationship of rocks to the history of the Earth.
Starting at the surface, they have studied as much of our planet's crust as can be accessed, which currently gives an upper limit of about 7.5 miles down (at the Kola Superdeep Borehole on the Kola Peninsula in Siberia, to the east of northern Finland).
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The Kola Superdeep Borehole in the former USSR reached a depth
of 12262 meters (40230 feet) in 1989, at which point drilling had
to be abandoned because of the extremely high temperatures.