Kōrero: Rock, limestone and clay

Blasting, Wilsonville quarry

Most hard-rock quarries use explosives, which are plugged into holes drilled in the rock face. When they are detonated the rock face shatters outwards onto the quarry floor. The rocks are then put into crushers which gradually reduce them to small pieces. Watch footage from a blast at Wilsonville limestone quarry, near Whāngārei, which supplies a cement works.

Te whakamahi i tēnei tūemi

Orica Mining Services
Video by Ian Hamilton

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Te tuhi tohutoro mō tēnei whārangi:

Carl Walrond, 'Rock, limestone and clay - Sources and uses', Te Ara - the Encyclopedia of New Zealand, http://www.TeAra.govt.nz/mi/video/5216/blasting-wilsonville-quarry (accessed 6 April 2020)

He kōrero nā Carl Walrond, i tāngia i te 12 Jun 2006