Question

What is the column of hot rock that continuously brings hot rock up from the mantle toward the crust?

Answer 1

mantle plume

Some volcanoes form over active hotspots . Scientists count about 50 hotspots on the Earth. Hotspots lie directly above a column of hot rock called a mantle plume . Mantle plumes continuously bring hot rock up from the mantle toward the crust   Figure below  . The rock melts due to the release of pressure.