162 



Subsurface Geologic Methods 



BEDDING 



Strike and dip of beds 



"trike and dip of overturned beds 



Strike of vertical beds 



It is suggested that this 

 symbol be used only where 

 the beds are known to be 

 right-side up. If it is 

 not known which side is 

 up, the following symbol 

 is suggested: ^-^ 



The position of the 90 

 can be used to indicate 

 the up side of the beds. 

 If so, this should be 

 stated in the Explanation. 



Horizontal beds 



scr^ soy 



Generalized strike and dip 



of crumpled, plicated, 

 crenulated, or undulating beds 



Strike and dip of beds 

 and plunge of slickensideb 



FOLIATION AND CLEAVAGE 



Strike and dip of foliation 



Strike of vertical foliation 

 Horizontal foliation 



Strike and dip of cleavage 



To be used for either 

 primary or secondary 

 foliation. For 

 distinguishing between 

 various types of planar 

 structures, the following 

 additional symbols are 

 suggested: 



///// 



The type of cleavage 

 mapped should be 

 specified in the 

 Explanation 



Strike of vertical cleavage 



Horizontal cleavage 



