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CORAL HEADS ARE DYNAMITED. Important in 

 the preparations of the site itself for the atomic 

 bomb tests was the blasting of coral heads from 

 the lagoon floor. Over 100 tons of dynamite had 

 to be used for this work. Coral heads constitute 

 the skeletal remains of the minute animal organ- 



isms also called corals, which once inhabited them. 

 At a distance coral heads roughly resemble cubical 

 boulders 30 feet on a side. Distinct obstructions 

 to navigation, they were charted in initial surveys 

 of the lagoon, which were made using fairly re- 

 liable Japanese maps as an aid, and then removed. 



