unconformable

The complete biological contrasts between the fossil contents of unconformable strata are sufficiently explicable.

Carboniferous rocks appear in small faulted tracts, unconformable on the Silurian, on 832 the shores of the Solway Firth.

Strata are said to be unconformable when they do not lie in regular, parallel sequence.

Although usually conformable to the oolite, it is sometimes, as in the Jura, unconformable.

In the grounds of the Admiralty House curious instances of unconformable strata are laid bare in old quarries.