Subsurface Maps and Illustrations 



927 



investigation of an area must use both sections and maps. Sections fall into 

 two general groups, structural and stratigraphic, although there are many 

 types that incorporate both stratigraphic and structural features. 



In figure 494, ^ is a structure section plotted on a natural scale. This 

 type of section does not attempt to show any structural features between 

 the wells, such as might be indicated on structural maps of the area, but 

 does show the diflference in elevation of the formations at the wells. 



In figure 494, J5 is a stratigraphic section along the same line, also 

 plotted on a natural scale. In a stratigraphic section one continuous strati- 



/;. Per mlaro 

 B - STRATIGRAPHIC SECTION 



C- STRATIGRAPHIC SECTION 



(oOUBLeo VERTICAL SCALEJ 



Figure 494. Structural and stratigraphic sections. 



