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).
Strunzite is a phosphate mineral of iron and manganese. Graftonite is a phosphate mineral of iron, manganese and calcium. Iron appears with magnesium and aluminum in the phosphate lazulite. Iron, magnesium and manganese form the phosphate mineral ludlamite.Phosphates of aluminum and iron are vauxite and paravauxite. A phosphate of iron and lithium is triphylite. Nickel is often found in association with iron and sometimes forms the compound Ni 3 Fe, called awaruite in its mineral form.Nickel-iron meteorites are fairly common. Common useful forms of iron alloys are cast iron, wrought iron, and steel.Wrought iron is made from cast iron by melting it on a bed of iron oxide. The final result is a material which is nearly pure iron, with only 0.1-0.2% of carbon and less than 0.5% of all impurities.trunzite is a phosphate mineral of iron and manganese. Graftonite is a phosphate mineral of iron, manganese and calcium. Iron appears with magnesium and aluminum in the phosphate lazulite. Iron, magnesium and manganese form the phosphate mineral ludlamite.