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.
Killing shot made at distance of 2,430 metres. Stephen Thorne. Canadian Press. A world-record killing shot by a Canadian sniper detachment in Afghanistan could never have been made with the ammunition they were issued when they left Edmonton last winter, the triggerman said in a recent interview. The Canadian .50-calibre rounds have a maximum range of between 2,200 and 2,300 metres.