86 
CONTETBUTIONS    TO    ECONOMIC    GEOLOGY,  1904. 
[BULL.  2(50. 
Graton  served  as  assistant  throughout  this  time,  actively  participat- 
ing in  all  branches  of  the  work.  Messrs.  A.  M.  Rock  and  J.  Bruce 
also  rendered  very  efficient  aid  as  draftsmen. 
PRODUCTION. 
Though  situated  close  to  the  centers  of  population  in  Colorado 
and  in  an  easily  accessible  region,  the  gold  deposits  of  Cripple  Creek 
were  not  discovered  until  1891.     In  1894,  when  the  first  survey  was 
made,  the  production  was  a  little  less  than  $8,000,000,  but  the  next; 
year  this  amount  was  more  than  doubled,  and  in  1900  the  maximum' 
production  of  a  little  over  $18,000,000  was  attained.     In  1901  and 
1902  the  production  declined  slowly,  and  dropped  the  next  year  to 
$13,000,000.     The  sudden  decrease  in  1903  was  to  some  extent  brought 
about  by  the  impoverishment  of  several  mines,  but  the  labor  troubles 
of  that  year  had  also  much  to  do  with  it.     From  August,  1903,  too 
the  summer  of  1904  many  mines  experienced  more  or  less  difficulty 
from  this  cause.     It  is  probable,  however,  that  the  output  for  the 
current  year  will  show  a  considerable  increase  over  that  of  1903. 
Production  of  the  Cripple  Creek  district  according  to  the  reports  of  the  Director 
of  the  Mint. 
Year. 
Gold. 
Silver. 
1891 
$449 
583,010 
2,010,367 
2, 908, 702 
6,879,137 
7,512,911 
10,139.709 
13,507,244 
15,658,254 
18,073,539 
17,261,579 
16, 912, 783 
12,967,338 
Fine  ounces. 
1892 
1893 
1894.. 
1895 
1896 
1897 
1898 
1899 
1900 
1901 
1902.... 
1908 
Total  . 
5,019 
25, 900 
70,448 
60, 864 
57, 297 
68, 195 
82, 520 
80, 166 
90, 884 
62, 690 
42,210 
124,415,022 
646, 193 
TOPOGRAPHY. 
The  mines  are  situated  in  a  group  of  bare,,  rounded  hills  formii  j 
pari  of  the  high  plateau  extending  southwestward  from  Pikes  Pea; 
and  are  only  about  10  miles  distant  from  that  prominent  landman* 
