subjacent

Wherever the subjacent rock is visible along the banks it presents beds of an ashen-grey pumice-stone, which constitutes the chief building material of Manila.

From Narrative of the Circumnavigation of the Globe by the Austrian Frigate Novara, Volume II (Commodore B. Von Wullerstorf-Urbair,) Undertaken by Order of the Imperial Government in the Years 1857, 1858, & 1859, Under the Immediate Auspices of His I. and R. Highness the Archduke Ferdinand Maximilian, Commander-In-Chief of the Austrian Navy. by Karl Ritter von Scherzer

The pebbles and larger masses of the conglomerate are quartzite, like that of the subjacent beds, and demonstrate the source of at least some of the material of the younger formation.

From The Geography of the Region about Devils Lake and the Dalles of the Wisconsin by Wallace W. Atwood

I see the point of it clear and sharp, but I see also the vast subjacent mass of solid knowledge.”

From Studies in Contemporary Biography by James Bryce, Viscount Bryce

Of these, the strata, near and under Paris, lying in a hollow of the subjacent strata, and hence termed the Paris Basin, attracted prominent notice in the first place.

From The Plurality of Worlds by Edward Hitchcock

Between the sclerotic and the subjacent choroid coat is a lymph space traversed by some loose pigmented connective tissue,—the 92 lamina fusca.

From Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 1 "Evangelical Church Conference" to "Fairbairn, Sir William" by Various