EFFECTS OF CROSS FAULTING. 



157 



Effect* f CTOSS faulting ideally considered. In order to understand the 

 resultant effect of such intersecting faults, let us take a simplified example such 

 as is shown in the stereogram, fig. 49. This shows a rectangular block which 

 has been affected by two sets of vertical faults, striking at right angles to each 

 other. On the figure they are also represented as equally spaced and all having 

 the same displacement, thus giving to the example an ideal simplicity which is 



FIG. 49. Stereogram showing the results of cross faults equally spaced and of equal throw. 



probably rarely found in nature. The result of these intersecting faults, as is 

 seen, is that lines or planes of equal displacement are zigzag, being made up of 

 regularly alternating portions of each of the two fault-system planes, the length 

 of each of the component straight lines being determined by the spacing of the 

 faults, while the trend of the whole zigzag, and therefore of the lines of equally 

 displaced blocks, is diagonal to both the fault systems. In effect, the resultant 



