Possibly, it may still be subject to gradual elevation.

If this is the case, its origin may well be attributed to subterranean fires.

Therefore, in this case, the theory of Sir Humphry Davy, Saknussemm's document, and my uncle's theories would all go off in smoke.

This hypothesis led me to examine with more attention the appearance of the surface, and I soon arrived at a conclusion as to the nature of the forces which presided at its birth.
Iceland, which is entirely devoid of alluvial soil, is wholly composed of volcanic tufa, that is to say, an agglomeration of porous rocks and stones.

Before the volcanoes broke out it consisted of trap rocks slowly upraised to the level of the sea by the action of central forces.