Geology of the Pacific Ocean Geology of the Pacific Ocean The Pacific Ocean evolved in the Mesozoic from the Panthalassic Ocean, which had formed when Rodinia rifted apart around 750 Ma. The first ocean floor which is part of the current Pacific Plate began 160 Ma to the west of the central Pacific and subsequently developed into the largest oceanic plate on Earth. The tectonic plates continue to move today. The slowest spreading ridge is the Gakkel Ridge on the Arctic Ocean floor, which spreads at less than , while the fastest, the East Pacific Rise near Easter Island, has a spreading rate of over
Columbia, the Gem of the Ocean set in 1912 – a full-cast rendition of "Columbia, the Gem of the Ocean" is performed during the scene depicting the town's Independence Day celebration and, from the post-World War II era through to the 1960s, the first few chords of "Columbia, the Gem of the Ocean" were used as an interval signal during Voice of America broadcasts, until ultimately replaced by "Yankee Doodle". In the 1957 Charles Mingus album The Clown, the title track contains a narrative story spoken by Jean Shepherd in which a clown - who suffers a fall from grace - initially has a "a seal