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Quarrying More than 23,000 work in the quarrying industry in some capacity Most work in rural areas Current UK aggregate outputs of crushed rock, sand and gravel is 320 million tonnes, the majority of which is used in the construction industry The market for aggregates is enormous; Quarrying is essential to the maintenance and growth of our society. The aggregates are used in building houses, schools, hospitals and shops. Roads, railways and airports. Also sewerage systems, sea defences, agricultural and leisure facilities. Aggregates are obtained from two main sources. In the first instance, rock is blasted from the quarry face and screened to yield stockpiles of 'sized' aggregates. Three basic types of rock are used to produce most crushed rock aggregates - igneous, sedimentary and metamorphic. The cliffe hill quarry uses an intermediate intrusive igneous rock called 'Granodiorite'. This rock is formed by solidification from the molten state. Environmental: It is often impossible to see a quarry...

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