On tectonically active worlds like remnants of the late heavy
bombardment are scarce.

not moving. pos accel,

igneous rocks also form where plates converge. the subducting plate melts as it sinks into the crust of the earth, and the melt rises into the overriding plate forming volcanoes. metamorphic rocks are formed mainly in the lithosphere, wherever there is high pressure and high temperature. -woods

explanation:

wheres the pic