superincumbent

Etymology

From Latin superincumbentem, present participle of superincumbere.

adj

1. (chiefly sciences) Lying or resting on something else; overlying.
   As the vapour cooled the water would be precipitated, and an ocean would surround the spherical nucleus with a superincumbent atmosphere. 1791, Erasmus Darwin, The Economy of Vegetation, J. Johnson, page 61
   The older Verrucano must have travelled to its present position as it slid and ground its way on the back of the oppressed Lochseiten limestone, which buckled and churned under the superincumbent load. 2004, Richard Fortey, The Earth, Folio Society, published 2011, page 87