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.
Billy Dixon, a civilian buffalo hunger, placed a shot with a Sharps .50-90 during the American Indian Wars in June of 1874 that spanned a distance of 1,538 yards. Dixon still ranks in at number 9 on the longest sniper shot list. Not bad for a guy relying on 19th century technology!