The most useful would be agrigate, which is basically just crushed rock of various varieties. The most common form is limestone. Agrigate is used in asphalt, concrete, gravel, building material, even in food products. It's uses are numerous, and civilized life wouldn't be the same without it. Another highly useful rock is Silica, its used to make glass, in packing material, as well as insulation. You could say goodbye to windows, your television screen, and glass jars without it.
2007-11-11 16:26:04
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answer #1
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answered by ianr1984 3
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coal. Bituminous coal is the most abundant type of coal in the United States and the one most commonly used for power generation, heating, and industrial purposes. Nearly all eastern bituminous coals have "coking" properties. Coking is a heating process that breaks down coal, leaving the relatively pure carbon needed for metallurgy. Many western bituminous coals are noncoking, or "free burning." Bituminous coals used in the coking process are heated in a sealed oven. After the volatile liquids and gases have been driven off, the coke, a porous, dull-gray mass, remains. The by-products driven off during the carbonization process, consisting of gases, light oils, and tar, have many important uses in the chemical industry.
2007-11-11 22:24:16
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answer #2
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answered by my life is a labyrinth 6
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Coal. Its classified as a biochemical sedimentary rock.
2007-11-11 16:19:20
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answer #3
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answered by Lady Geologist 7
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i think its limestone, its used in roads and other concrete structures it is also used in buildings
also coal isnt a rock
2007-11-11 16:20:55
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answer #4
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answered by Anonymous
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Halite - rock salt
2007-11-12 00:47:17
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answer #5
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answered by Anonymous
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diamonds. they get used in tons of industrial settings. there are a lot of things we would not have or be able to do without them. and they make women happy. what else could be more useful?
2007-11-11 16:19:05
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answer #6
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answered by eric r 3
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The Earth because without it we wouldnt be here today.
2007-11-11 16:25:18
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answer #7
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answered by jesus_and_the_decibels 3
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I would have to say coal.
2007-11-11 16:20:19
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answer #8
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answered by sonicview890 1
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diamond
2007-11-11 16:21:44
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answer #9
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answered by Anonymous
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probably coal
2007-11-11 16:18:43
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answer #10
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answered by nas 3
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