A term that is sometimes used for oceanic crust rocks is sima, which is short for magnesium silicate, a common component of these rocks. Another term for these undersea igneous rocks is mafic, which comes from the fact that they are high in magnesium and iron. Basalt and gabbro are examples of mafic rocks.
The current record is held by Briton Corporal of Horse (CoH) Craig Harrison, of the UKâs Household Cavalry, who recorded a 2,475 m (2,707 yd) shot (confirmed by GPS) in November 2009, also during the War in Afghanistan, in which he hit two Taliban insurgents consecutively.
Furlong's first shot missed and his second shot hit the knapsack on the target's back. The third struck the target's torso, killing him. The distance was measured as 2,430 m (2,657 yd). With a muzzle speed of 823 m/s (2,700 ft/s), each shot reached the target almost four seconds after Furlong fired. This became the longest sniper kill in history at the time, surpassing the previous record set by his teammate, Master-Corporal Arron Perry, by 120 m (130 yd).