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Water pooled 3–6 kilometres (1.9–3.7 mi) below the surface, [14] [15] having percolated up through the granite until it reached a layer of impermeable rock. [16] [17] This water did not naturally vaporize at any depth in the borehole. [15] The drilling mud that flowed out of the hole was described as "boiling" with an unexpected level of ...
This is a list of places on land below mean sea level. Places artificially created such as tunnels, mines, basements, and dug holes, or places under water, or existing temporarily as a result of ebbing of sea tide etc., are not included.
In marked contrast to the Kairei surveys of 1998 and 1999, the detailed survey in 2002 determined that the deepest point in the Challenger Deep is located in the eastern basin around , with a depth of 10,920 ± 5 m (35,827 ± 16 ft), located about 290 m (950 ft) southeast of the deepest site determined by the survey vessel Takuyo in 1984. The ...
[1] Caleuche Chasma: 400 km (250 mi) ? 13 km (8.1 mi) Depth estimated in the range 10–16 km (6.2–9.9 mi). [2] Miranda: tectonic grabens 20 km 10-20 km Extensive series of grabens and scarps that cover most of the moon. Titania: Messina Chasma: 1492 km (900 mi) 50 km (30 mi) 2-5 km Geologically young belt of grabens that cut through craters.
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 expedition of the Ukrainian Speleological Association reached a depth of 1,910 m (6,270 ft) which exceeded the depth of the previous deepest ...
Ellison's features a number of underground vertical pitches including the two deepest pits in the contiguous United States: Fantastic (586 feet) and Incredible (440 feet). [2] These two pits lie on opposite sides of the cave. Nearby and parallel to Fantastic are Smokey I (500 feet), Smokey II (262 feet), and other deep pitches.
Sonar mapping of the Challenger Deep by the DSSV Pressure Drop employing a Kongsberg SIMRAD EM124 multibeam echosounder system (26 April–4 May 2019) Challenger Deep (CD) is the deepest known point in the Earth's seabed hydrosphere , a slot-shaped valley in the floor of Mariana Trench , with depths exceeding 10,900 meters. [ 1 ]
Parker Dam is a concrete arch-gravity dam that crosses the Colorado River 155 miles (249 km) downstream of Hoover Dam.Built between 1934 and 1938 by the Bureau of Reclamation, it is 320 feet (98 m) high, 235 feet (72 m) of which are below the riverbed (the deep excavation was necessary in order to reach the bedrock on which the foundation of the dam was built), [1] [2] making it the deepest ...