FOLDS RESULTING FROM VERTICALLY ACTING FORCES 341 



Fig. 2. — The direction of the axes of folds as indicated by the results of deep 

 drilling. Adapted from R. A. Smith. 



LINEAR TERRACE FOLDS AND MONOCLINES BY FAULTING 



These folds which exhibit similar features, and are well known 

 from their development as oil producing areas, differ only in their 



