15 



Vein Material 

 White Limestone 



White Porphyry 

 I ' i ' 1 1 Blue Limestone 

 fc-ffi:| Gray Porphyry 



FIG. 13. Section on the gold ore chute of Iron Hill, Leadville, Colorado. 



(After Blow.) 



FIG. 14. A troop of horses with the vein passing around it on both sides. 

 A, Country rock; H, horse; F, fault. 



