The US Coast Guardâs largest patrol cutters are the 418 foot, 4,500 ton full load Bertholf Class National Security Cutters. The illustration that accompanies the story of the four new 5,000 ton cutters shows a ship, in many ways similar to the National Security Cutter. It appears there is a medium caliber gun on the bow.
Amphibolite is a rock composed mostly of amphibole minerals. Usually it's a hornblende schist like this as hornblende is the commonest amphibole.(more below). Amphibolite forms when basaltic rock is subjected to higher temperatures (550750Â°C) and slightly greater pressure range than that which yields greenschist.mphibolite is a rock composed mostly of amphibole minerals. Usually it's a hornblende schist like this as hornblende is the commonest amphibole. (more below).
Bauxite is a rock composed mainly of Aluminium Oxide and Aluminium Hydroxide minerals. These might include: Gibbsite, Boehmite and Diaspore.The rock usually includes other materials such as Iron Hydroxide, clay, silt and free Silica. It most often occurs as a residual soil material in tropical and subtropical areas.It is the primary source of Aluminium.auxite is a rock composed mainly of Aluminium Oxide and Aluminium Hydroxide minerals. These might include: Gibbsite, Boehmite and Diaspore.