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.
Barrett M82A1 (Photo credit: Wikipedia) Kremer holds the fourth spot for a shot placed from a range of 2,515 yards, narrowly beating out Hathcockâs record. This U.S. soldier used a Barrett M82A1 and was a member of the 2nd Ranger Battalion in the Iraq War. He was not however the first to break Hathcockâs record.