

Photograph from U. S. Geological Survey 

 RICH Oily SHAI.K LEDGE OUTCROPPING NEAR GRAND VAPPEY, COLORADO 



Although the oil reserves of the United States are greater than the amount produced in 

 the entire world from the birth of the industry until now, yet the output at the present time 

 is such that it would exhaust the reserves in 30 years. But now comes the discovery of such 

 an abundance of oil in American shales that all the oil produced in the whole world in the 

 entire history of the industry is only a drop in the bucket in comparison with the supply the 

 rocks offer us. 



203 



