Mirny Diamond Mine, Siberia
Mir Mine also called Mirny Mine is an open pit diamond mine located in Mirny, Eastern Siberia, Russia. The mine is 525 meters (1,722 ft) deep (4th in the world) and has a diameter of 1,200 m (3,900 ft), and is the second largest excavated hole in the world, after Bingham Canyon Mine. The airspace above the mine is closed for helicopters because of a few incidents in which they were sucked in by the downward air flow.
In the 1960s the mine was producing 10,000,000 carats (2,000 kg) of diamond per year, of which a relatively high fraction (20%) were of gem quality. The upper layers of the mine (down to 340 meters) had very high diamond content of 4 carats (0.80 g) per tonne of ore, with the relatively high ratio of gems to industrial stones. The yield decreased to about 2 carats (0.40 g) per tonne and the production rate slowed to 2,000,000 carats (400 kg) per year near the pit bottom. The largest diamond of the mine was found on 23 December 1980; it weighed 342.5 carats (68 g) and was named "26th Congress CPSU". The mine operation was interrupted in 1990s at a depth of 340 m after the pit bottom became flooded but resumed later.
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| The red arrow on the right is pointing a huge truck. |
Glory Hole – Monticello Dam
Monticello Dam is a dam in Napa County, California, United States constructed between 1953 and 1957. It is a medium concrete-arch dam with a structural height of 304 ft (93 m) and a crest length of 1,023 ft (312 m). It contains 326,000 cubic yards (249,000 m³) of concrete. The dam impounded Putah Creek to cover the former town of Monticello and flood Berryessa Valley to create Lake Berryessa, the second-largest lake in California.
The capacity of the reservoir is 48,400 acre·ft (59,700 dam³). Water from the reservoir is supplied mostly to the North Bay area of San Francisco. The dam is noted for its classic, uncontrolled spillway with a rate of 2,580 cubic feet per second, at a water surface elevation of 455.5 feet. The diameter at the lip of 72 ft (22 m). Locally, the spillway is also known as 'The Glory Hole'.
The capacity of the reservoir is 48,400 acre·ft (59,700 dam³). Water from the reservoir is supplied mostly to the North Bay area of San Francisco. The dam is noted for its classic, uncontrolled spillway with a rate of 2,580 cubic feet per second, at a water surface elevation of 455.5 feet. The diameter at the lip of 72 ft (22 m). Locally, the spillway is also known as 'The Glory Hole'.
Bingham Canyon Mine, Utah
The Bingham Canyon Mine, also known as the Kennecott Copper Mine, is an open-pit mining operation extracting a large porphyry copper deposit southwest of Salt Lake City, Utah, USA, in the Oquirrh Mountains. It is the deepest open-pit mine in the world.
The mine is owned by Rio Tinto Group, an international mining and exploration company headquartered in the United Kingdom. The copper operations at Bingham Canyon Mine are managed through Kennecott Utah Copper Corporation which operates the mine, a concentrator plant, a smelter, and a refinery. The mine has been in production since 1906, and has resulted in the creation of a pit over 0.75 miles (1.2 km) deep, 2.5 miles (4 km) wide, and covering 1,900 acres (7.7 km²). According to Kennecott, it is the world's largest man-made excavation. It was designated a National Historic Landmark in 1966 under the name Bingham Canyon Open Pit Copper Mine.
The mine is owned by Rio Tinto Group, an international mining and exploration company headquartered in the United Kingdom. The copper operations at Bingham Canyon Mine are managed through Kennecott Utah Copper Corporation which operates the mine, a concentrator plant, a smelter, and a refinery. The mine has been in production since 1906, and has resulted in the creation of a pit over 0.75 miles (1.2 km) deep, 2.5 miles (4 km) wide, and covering 1,900 acres (7.7 km²). According to Kennecott, it is the world's largest man-made excavation. It was designated a National Historic Landmark in 1966 under the name Bingham Canyon Open Pit Copper Mine.
Great Blue Hole, Belize
The Great Blue Hole is a large underwater sinkhole off the coast of Belize. It lies near the center of Lighthouse Reef, a small atoll 70 kilometres (43 mi) from the mainland and Belize City. The hole is circular in shape, over 300 metres (984 ft) across and 124 metres (407 ft) deep.
It was formed during several episodes of Quaternary glaciation when sea levels were much lower - the analysis of stalactites found in Great Blue Hole shows that formation has taken place 153,000; 66,000; 60,000; and 15,000 years ago. As the ocean began to rise again, the caves were flooded. The Great Blue Hole is a part of the larger Belize Barrier Reef Reserve System, a World Heritage Site of the United Nations Educational, Scientific and Cultural Organization (UNESCO).
It was formed during several episodes of Quaternary glaciation when sea levels were much lower - the analysis of stalactites found in Great Blue Hole shows that formation has taken place 153,000; 66,000; 60,000; and 15,000 years ago. As the ocean began to rise again, the caves were flooded. The Great Blue Hole is a part of the larger Belize Barrier Reef Reserve System, a World Heritage Site of the United Nations Educational, Scientific and Cultural Organization (UNESCO).
Diavik Mine, Canada
The Diavik Diamond Mine is a diamond mine in the North Slave Region of the Northwest Territories, Canada, about 300 kilometres (186 miles) north of Yellowknife. It has become an important part of the regional economy, employing 700, grossing C$100 million in sales, and producing 8 million carats (1600 kg) of diamonds annually.
The area was surveyed in 1992 and construction began in 2001, with production commencing in January 2003. It is connected by an ice road and Diavik Airport with a 5,235-foot (1,596 m) gravel runway regularly accommodating Boeing 737 jet aircraft.
The area was surveyed in 1992 and construction began in 2001, with production commencing in January 2003. It is connected by an ice road and Diavik Airport with a 5,235-foot (1,596 m) gravel runway regularly accommodating Boeing 737 jet aircraft.
Sinkhole, Guatemala
A sinkhole happens when a large amount of water (usually rainwater or sewage) is soaked up by the earth in a large scale, causing the ground to collapse.
These photos are the sinkhole that occurred early this year in Guatemala. The hole swallowed a dozen homes and killed at least 3 people.
Guatamala Sinkhole is 330 ft (100 m) deep; twice taller than The Statue of Liberty which is 151 ft (46 m) tall.
Guatamala Sinkhole is 330 ft (100 m) deep; twice taller than The Statue of Liberty which is 151 ft (46 m) tall.
Source: www.wikipedia.com & cheeju.wordpress.com
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