[DonRotolo]

I don't understand the question.

Are you asking if "On the top surface of the plane" equals "above the plane"?

If so, let's think at the atomic level - here's the atoms of the top surface of the plane, and then there is something (wheel atoms?) resting upon them - that is "above" the top surface of the plane. Right?

Put another way: Can it be beneath the surface? If not, then it has to be above. The surface itself is impermeable, so it can't be "at" the exact surface of the plane.