Slurms:
The oceans are not that deep on Earth. If the oceans were that deep then the massive weight of the water on the seafloor would compress the ground which would trigger more fault lines which would cause more earthquakes in the ocean triggering more tsunamis which would wash away all the sand on the tops of mountains but there are no mountain so where would the sand go? Well, there isn't any sand in the first place so the meaning of this reply is: Put sand on.