1) If you lift a clock to a greater height, you have to do work on it - the work done appears as gravitational energy stored in the clock; This shows up in the guise of extra tick-tock energy, as a result of which the clock ticks a bit faster. ------- 2) Time is slower deep down in a potential well. Potential measures the work that it would take to haul something back out. Tie a rope to it and lower it down a hole and it will run slower. What matters is how much work it would take to haul it up and out. ------- Do you agree w/#1 and or #2 above? Both of these points, which are not mine, make it seem that it is the act of moving the clock which changes its time to run either faster or slower, and not 'where' it is located. So, a clock made on the top of a mountain, or made at the bottom of a mine shaft should run exactly like a clock located at the earth's surface!?