Over 80 percent of Earth's magma extruded through volcanism occurs at oceanic spreading centers.

Name: Over 80 percent of Earth's magma extruded through volcanism occurs at oceanic spreading centers.
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This is true. The majority of magma extruded through volcanism occurs at oceanic spreading centers, where tectonic plates are moving apart and magma from the mantle rises to the surface. This leads to the creation of new oceanic crust.

Over 80 Percent of Earth's Magma Extruded Through Volcanism Occurs