Pacific Ocean closed loop of the andesite line are most of the deep troughs, submerged volcanic mountains, and oceanic volcanic islands that characterize the Pacific basin. Here basaltic lavas gently flow out of rifts to build huge dome-shaped volcanic mountains whose eroded summits form island arcs, chains, and clusters. Outside the andesite line, volcanism is of the explosive type, and the Pacific Ring of Fire is the world's foremost belt of explosive volcanism. The Ring of Fire is named after the several hundred active volcanoes that sit above the various subduction zones. The Pacific Ocean is the only ocean which is almost
Ring of Fire (Northern Ontario) tonnes per year for more than thirty years". Carrabba announced that the ore would be "further processed into 400,000–800,000 tonnes of ferrochrome". The purchase was finalized in 2010. According to Carrabba the area of the Ring of Fire that Cliffs acquired in 2009 represents one of the "premier chromite deposits in the world. Chromite is smelted to produce ferrochrome which is used globally in the production of stainless steel and is categorized as a strategic metal resource by many countries. In May 2012, Cliffs announced a "$3.3-billion investment to build a chromite mine, transportation corridor and processing facility in northern