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trap rock

   Also found in: Wikipedia 0.02 sec.
trap rock [′trap ¦räk]
(aerospace engineering)


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The controversy over a proposed Wawa trap rock quarry on Lake Superior, and its potential environmental impact, could have been avoided if all of Ontario were covered under the Aggregates Resources Act.
Basu and his co-workers traced the origin of the Deccan Trap rocks by measuring the ratio of two helium isotopes preserved within bubbles in the basalt.
A controversial Wawa trap rock quarry project will now come under the auspices of the province's Aggregates Resources Act.
 
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