Driving Forces of Volcanism
Movement of molten rock in the mantle, caused by thermal convection currents, coupled with gravitational effects of changes on the earth's surface (erosion, deposition, even asteroid impact and patterns of post-glacial rebound) drive plate tectonic motion and ultimately volcanism.
Read more about this topic: Volcanism
Famous quotes containing the words driving and/or forces:
“As it grew darker, I was startled by the honking of geese flying low over the woods, like weary travellers getting in late from Southern lakes, and indulging at last in unrestrained complaint and mutual consolation. Standing at my door, I could hear the rush of their wings; when, driving toward my house, they suddenly spied my light, and with hushed clamor wheeled and settled in the pond. So I came in, and shut the door, and passed my first spring night in the woods.”
—Henry David Thoreau (1817–1862)
“I’ve learned one thing about life. We’re a good deal like that ball, dancing on the fountain. We know as little about the forces that move us, and move the world around us, as that empty ball does.”
—Ardel Wray, Edward Dien, and Jacques Tourneur. Dr. Galbraith(James Bell)