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
Seagaia Ocean Dome of the resort. It was reopened in 2016 but closed and demolished in 2017. The Ocean Dome sported a simulated flame-spitting volcano, artificial sand and the world's largest retractable roof, which provided a permanently blue sky even on a rainy day. The air temperature was always held at around and the water at around . The roof of the structure was retractable in four sections. Seagaia Ocean Dome The , was one of the world's largest indoor waterparks, located in Miyazaki, Miyazaki, Japan. The Polynesia-themed Ocean Dome, which was a part of the Sheraton Seagaia Resort, measured 300 metres in