COPPER 
COPPER  DEPOSITS  OF  THE  HARTVILLE  UPLIFT, 
WYOMING. 
By  Sydney  H.  Ball. 
INTRODUCTION. 
While  investigating  the  iron  ores  and  pre -Cambrian  geology  of 
the  Hartville  iron  range,  Wyoming,  in  the  field  season  of  1906, 
the  writer  visited  the  copper  mines  and  prospects  of  this  region  with 
the  exception  of  those  in  Muskrat  Canyon.  The  following  notes 
are  the  result  of  this  work.  Grateful  acknowledgments  are  due  to  the 
mining  men  of  the  district,  particularly  to  Messrs.  Louis  B.  Weed,  of 
Sunrise;  C.  A.  Guernsey  and  W.  T.  Kelley,  of  Guernsey;  Peter  Hoyer, 
of  Hartville;  William  Lauck  and  Joseph  L.  Stein,  of  Frederick;  and 
Edwin  Hall  and  Henry  Metz,  of  Lusk. 
The  scant  literature  concerning  these  copper  deposits  is  included 
in  the  following  bibliography: 
Mineral  Resources  U.  S.,  1882,  U.  S.  Geol.  Survey,  1883,  pp.  229,  758-759. 
Idem  for  1883-84,  p.  342. 
Idem  for  1887,  p.  70. 
Idem  for  1888,  p.  59. 
Ricketts,  Louis  D.,  Ann.  Rept.  Territorial  Geologist  to  Governor  of  Wyoming, 
January,  1888. 
Idem  for  1890,  pp.  52-55,  77-78. 
Knight,  Wilbur  C,  Bull.  Wyoming  Exper.  Sta.  (Laramie,  Wyo.)  No.  14,  Univ.  Wyo- 
ming, October,  1893,  pp.  135,  210. 
Smith,  W.  S.  Tangier,  Hartville  folio:  Geologic  Atlas  U.  S.,  folio  91,  U.  S.  Geol. 
Survey,  1903. 
The  geography  and  the  geology  of  the  Hartville  uplift  are  treated 
briefly  in  the    article  in  this   bulletin  on  the  Hartville    iron  range 
(pp.  190-205).     The  geologic  column  consists  of  the  following  pre- 
Cambrian formations:  A  schist-limestone  series,  a  quartzose  and  jasper 
series,  diorites  and  gabbros  and  schists  derived  from  them,  granite, 
and  diabase.     Flat-lying  Carboniferous  rocks  overlie  the  pre-Cam- 
brian  rocks.     Of  the  two  Carboniferous  formations  the  Guernsey  is 
the  older  and  the  Hartville  lies  upon  it. 
93 
