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This huge company further worked on the Big Hole until it came to the depth of 215 metres, with a surface area of about 17 hectares and perimeter of 1.6 kilometres. By 14 August 1914, when work on the mine ceased, over 22 million tons of rock had been excavated, yielding 3,000 kilograms (14,504,566 carats) of diamonds.
As material slid into the hole formed, it closed the vent and the process repeated, eventually forming the huge hole. [3] Blocks as large as 26 feet (8 m) in size were flung as far as 2.3 miles (3.7 km) from the crater. [4] To the west of Hole-in-the-Ground is an even bigger maar, 1.1 miles (1,820 m), but older and more eroded, called Big Hole.
In his notes for "I Wish I Was a Mole in the Ground", supplied with the Anthology in 1952, Smith disagrees about the meaning of "The Bend" when he wrote: The narrator's wish to be a mole in the ground and a lizzard [sic] in the spring are quite surrealistic in their symbolism. "The Bend" ("pen" in some other versions) probably refers to the Big ...
Big Hole is a large maar (explosion crater) in the Fort Rock basin of Lake County, central Oregon, northeast of Crater Lake, near Oregon Route 31. It is approximately 6000 ft (1820 m) across and 300 feet (91 m) deep. [3] It is close to another smaller, but less-eroded maar crater, Hole-in-the-Ground.
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 Great Blue Hole, a giant submarine sinkhole, near Ambergris Caye, Belize. The following is a list of sinkholes, blue holes, dolines, crown holes, cenotes, and pit caves. A sinkhole is a depression or hole in the ground caused by some form of collapse of the surface layer.
The bolide made impact at a speed of approximately 17.8 kilometers per second (11.1 miles per second), [4] punching a deep hole through the sediments and into the granite continental basement rock. The bolide itself was completely vaporized, fracturing the basement rock to depths of 8 km (5 mi), and raising a peak ring around it.
The Red Lake sinkhole in Croatia. A sinkhole is a depression or hole in the ground caused by some form of collapse of the surface layer. The term is sometimes used to refer to doline, enclosed depressions that are also known as shakeholes, and to openings where surface water enters into underground passages known as ponor, swallow hole or swallet.