The orientation in space of an atomic orbital is associated with

The magnetic quantum number is one of the four quantum numbers that characterize the quantum state of an electron bound from an atom.

This number determines the spatial orientation of the orbital and its name is due to the fact that this spatial orientation is normally defined in relation to an external magnetic field.

Therefore:

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