Converse of object

• contain: If you turn your back on the interpretative panel the landscape contains the unconformity - with Quinag looming above.

Adjective modifier

• basal: One of the most dramatic features of much of the Torridonian outcrop is the basal unconformity with the Lewisian basement.

• regional: All basement reservoirs underlie a regional unconformity and almost all lie on an uplift or high.