Subsurface Geologic Methods 



L 



«3 C3 C 



C? -fi> J? 



:^ 



^\ /\ /x 



/\ /\ /\ 



+ + + 

 + f 



Sandstone 



Sandstone 

 (ferruginous) 



Sandstone 

 ( calcareous) 



Sandstone 

 (argillaceous) 



Conglomerate 

 Breccia 



Siltstone 



Quartzite 

 (ortho) 



Sandstone 

 (arkosic^ 



Sandstone 

 (graywacke) 



Shale (gray) 



Shale 



( red & green) 



Shale 

 (calcareous) 



Shale 

 (arenaceous) 



Shale 

 (varicolored) 



Limestone 



Limestone 

 ( arenaceous) 



Limestone 

 (dolomitic) 



Dolostone 



Dolostone 

 (arenaceous) 





+ + i- 

 -I- + 



XXX 



Gypsum 



Anhydrite 



Salt 



Schist 



Quartzite 

 ( meta) 



Marble 



Slate 



Igneous 

 (basic) 



Igneous 

 ( acid ) 



Tuff 



Plate H. Colored well-log symbols. 



