superincumbent

1. (chiefly sciences) Lying or resting on something else; overlying.Examples: "As the vapour cooled the water would be precipitated, and an ocean would surround the spherical nucleus with a superincumbent atmosphere."; "[…] alas, on the contrary, what troops and populations of Phantasms, not God-Veracities but Devil-Falsities, down to the very lowest stratum, — which now, by such superincumbent weight of Unveracities, lies enchanted in St. Ives’ Workhouses, broad enough, helpless enough!"; "Then a superincumbent bundle rolled down, with a whisking noise, flames elongated, and bent themselves about with a quiet roar, but no crackle."