The Monoclinal Fold is a somewhat exceptional type, which can hardly be regarded as a modified form of the anticline. A monoclinal flexure is a single, sharp bend connecting strata which lie at different levels and are often horizontal except along the line of flexure. Folds of this character are very common in many parts of the West, especially in the high plateau region of Utah and Arizona.

Fig. 164. - Diagram of monoclinal fold.

Fig. 165. - Monoclinal tola, Selmas Valley. (U. S. G. S).

Fig. 166. - Monoclinal fold. Mead River, Alaska. (U. S. G. S).