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 (1991 film) Ring of Fire (1991 film) Ring of Fire is a 1991 documentary film in IMAX format. It looks at some of the varieties of volcanism and earthquake activity in the Ring of Fire, around the Pacific Rim. The film runs 40 minutes. The film was jointly presented by the Fort Worth Museum of Science and History in Fort Worth, Texas, the Science Museum of Minnesota in Saint Paul, Minnesota, and the Reuben H. Fleet Space Theater and Science Center in San Diego, California. The film has eight main segments, corresponding to chapters in the DVD release: 1. "Ring of Fire":