GEOLOGY OF THE BEARTOOTH MOUNTAINS, MONTANA 443 



Mesozoic Tertiary Vo'lcanics 



{including Fort Union](>(ith some intrusives) 



Fault 



JO 20 



Scale in miles 



Fig. I. — Sketch geologic map of the Beartooth Mountains and environs. Based in 

 part on publications of the United States Geological Survey. Geology northwest of 

 Cody after C. L. Dake. Geology west and south of Livingston somewhat generalized. 



