Randomly distributed heat will cause heat to build up more so in certain places below the crust. The hotter the material is below the crust the higher the probability will be for an x amount of lava to be added to the surface. Also the hotter the faster it loses heat, volcanoes result in major cooling.
Randomly distributed heat will cause heat to build up more so in certain places below the crust. The hotter the material is below the crust the higher the probability will be for an x amount of lava to be added to the surface. Also the hotter the faster it loses heat, volcanoes result in major cooling.