THE  DEER  CREEK  COAL  FIELD,  ARIZONA. 
241 
extremely  rough  and  rugged,  but  in  the  vicinity  of  Gila  River  the 
range  is  of  only  moderate  altitude  and  of  simple  structure.     This 
Car/ os. 
portion  is  known  locally  as  Mescal  Mountain,  and  it  forms  the  north- 
eastern limit  of  the  Deer  Creek  coal  field,  separating  the  valley  of 
Bull.  225—04 16 
