Monoclines may be formed in several different ways (see diagram)
- By differential compaction over an underlying structure, particularly a large fault at the edge of a basin due to the greater compactibility of the basin fill, the amplitude of the fold will die out gradually upwards.
- By mild reactivation of an earlier extensional fault during a phase of inversion causing folding in the overlying sequence.
- As a form of fault propagation fold during upward propagation of an extensional fault in basement into an overlying cover sequence.
- As a form of fault propagation fold during upward propagation of a reverse fault in basement into an overlying cover sequence.
- Waterpocket Fold in Capitol Reef National Park, Utah
- Grandview-Phantom Monocline in the Grand Canyon, Arizona
- Lapstone monocline in the Blue Mountains (Australia)
- Purbeck Monocline on the Isle of Purbeck, Dorset, England