When a volcano cools, igneous rock channel residual lintasanya very deep and is 2 kilometers. Diamonds formed at very high temperatures in this rock, and now this mountain contains one of the world's richest diamond deposits.
This mine is a large gaping open pit in the ground. Every day about 25,000 tonnes of rock excavated. It produces about 23 kilograms of diamonds. Each year about 8.5 tons of diamonds have been sold.
Argyle is the only diamond mine in Australia. The production is very high which is now Australia has become the fifth largest diamond exporter in the world. Ordering:
Russia, Botswana, South Africa, Zaire, and Australia.
Transparent good quality diamonds used for jewelry. Another type of diamond used in industry. Diamonds are used for cutting metal or stone that is very hard. Most diamonds used for jewelry are cut and formed in Bombay, India.
Argyle mine employs 700 people to mine diamonds. They work for twelve hours every day. This work is difficult because diamonds are very small and very precious. Most workers live in the city of Perth which is located 1600 kilometers south of the mining area. The workers are in a plane flying from Perth to mining. They work for two weeks. Then they go home by plane to Perth for two weeks
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| coal |
Coal is a fossil fuel.
Coal is a combustible sedimentary rock, formed from the organic sediment, which originated from the remains of plants and has developed through geological time. Elements consisting of carbon, hydrogen and oxygen.
Coal is also an organic rock that has the properties of the complex physics and chemistry.
empirical formula such as C137H97O9NS to C240H90O4NS bitumen and anthracite for.
Coal formation requires certain conditions and only occur in a particular era in the history of geology. Carboniferous Period, roughly 340 million years ago, is the formation of the most productive coal and almost all coal mines (coal black) who live in the northern hemisphere is formed.
In the Permian Period, about 270 Mya, is also an economical form of coal deposits in the southern hemisphere, like Australia, and continues until the Tertiary Period (70-13 Mya) in the other hemisphere.
Almost all coal-forming plant origin.
Coal mining coal mining from the earth for human use in many coal mines in Indonesia and even the world.
Coal used as fuel, can also be used to make coke for the manufacture of many more baja.dan their role, there are many coal mines in Indonesia, especially in Kalimantan
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