212 



Print /14 Graphic produced by John Turk, USGS, identifying ratios of 

 sulfur isotopes at selected locations in Colorado. The information on this 

 print indicates that sulfur isotopes in the snow pack are significantly 

 different in an area which includes the Mt. Zirkel Wilderness as compared 

 to other selected sites in Colorado. 



o 



ISBN 0-16-046517-6 



9 780160"465178 



90000 



