242 DISPLACEMENTS OF STRATA 



often extremely difficult to work out, and in an elementary book, 

 intended for the beginner, it is not necessary to do more than 

 mention them. 



The monoclinal fold is a somewhat exceptional type, which can 

 hardly be regarded as a modified form of the anticline. A mono- 

 clinal 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. 



