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How does the East Pacific Rise create new ocean crust?

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Map of the Pacific Ocean showing depth contours in varying shades of blue, major submarine features such as trenches, ridges, and basins labeled throughout the ocean, and neighboring landmasses including Asia, Australia, North and South America. Principal cities along the Pacific rim and island groups are marked, along with international boundaries.
Pacific Ocean

The East Pacific Rise creates new ocean crust through the process of seafloor spreading at a divergent plate boundary. As tectonic plates move apart, basaltic lava wells up from the mantle along the ridge's crest. This molten material cools and crystallizes to form new oceanic crust, which then moves away from the ridge in both directions.12

Seismic studies have confirmed the presence of magma chambers located approximately 2 kilometers beneath the seafloor along the crest of the rise. These chambers serve as the source for the volcanic activity that continuously replenishes the crust. The East Pacific Rise is characterized by one of the most rapid spreading rates on Earth, reaching up to 6.3 inches (16 cm) per year in some areas. This ongoing volcanism also fuels hydrothermal vents, which support unique ecosystems through chemosynthesis.31