SRL for [with a volume estimated at 1 to 1.3?109 m3]: In April 1974 a gigantic and fast rockslide [with a volume estimated at 1 to 1.3?109 m3] dammed the Mantaro river in the Peruvian Andes , causing more than 450 casualties and forming a 130 m to 150 m high dam [ 16 , 17 ] .
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