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
How Deep Is the Ocean? How Deep Is the Ocean? "How Deep Is the Ocean " is a popular song written by Irving Berlin in 1932. The song was developed from an earlier Berlin song "To My Mammy" which was sung by Al Jolson in his film "Mammy" (1930). In the earlier song, the lyrics include the questions "How deep is the ocean? / How high is the sky?" and this was the genesis of "How Deep Is the Ocean?". The song was written at a low point in Berlin's professional and personal life, and is among the select few of his numbers that were