When creating any map, what four basic elements should you include?

the displacement produced by the body.  

the amount of force subjected to the body.  

the angle between the direction of force and displacement

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