THE  GRANITE-BIMETALLIC  AND  CABLE  MTNES, 
PHILIPSBURG  QUADRANGLE,  MONTANA." 
By  W.  H.  Emmons. 
INTRODUCTION. 
The  Philipsburg  quadrangle  is  a  30-minute  area,  which  joins  the 
south  half  of  the  Helena  60-minute  quadrangle  on  the  west.  Its 
eastern  border  is  about  a  mile  west  of  Anaconda,  and  its  northern 
border  is  just  south  of  Stone  station,  on  the  Philipsburg  and  Drum- 
mond  branch  of  the  Northern  Pacific  Railway.  During  the  summer 
and  autumn  of  1906  Messrs:  F.  C.  Calkins  and  D.  F.  MacDonald  were 
engaged  in  mapping  the  geology  of  the  quadrangle,  while  the  writer 
studied  the  ore  deposits.  The  results  of  this  work  will  be  published 
later  by  the  Survey.  It  is  the  purpose  of  this  paper  to  give  a  brief 
description  of  two  of  the  most  important  mines. 
The  thanks  of  the  writer  are  due  Mr.  S.  F.  Emmons,  in  charge  of 
the  division  of  metalliferous  ore  deposits  of  the  Survey,  for  valu- 
able criticism  and  advice;  to  Mr.  Paul  A.  Fusz  and  associates,  of  the 
Granite-Bimetallic  mine;  and  to  the  Messrs.  Bacorn  and  Mr.  Adami,  of 
the  Cable.  The  courtesy  of  all  the  officers  of  these  mines  has  made  the 
field  work  more  agreeable  and  their  carefully  kept  maps  and  records 
have  made  it  more  effectual  than  it  would  otherwise  have  been.  Inas- 
much as  this  paper  was  written  in  the  field,  prior  to  the  study  of  notes 
and  collections,  the  writer  reserves  the  privilege  to  revise  statements 
and  conclusions  in  the  final  report. 
TOPOGRAPHY  OF  THE  QUADRANGLE. 
The  Philipsburg  quadrangle  is  for  the  most  part  mountainous  and 
varies  in  elevation  from  4,600  to  10,600  feet.  The  central  portion  of 
the  quadrangle  is  drained  by  Flint  Creek,  which  rises  near  Cable 
Mountain  and  flows  northeastward  to  Missoula  River.  On  both  sides 
of  this  creek  is  a  considerable  area  of  relatively  low  hills,  wooded  only 
in  part,  which  furnish  good  pasturage  for  cattle,  and  in  the  valley 
a  Preliminary  paper,  conclusions  are  subject  to  revision. 
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