DENVER & RIO GRANDE WESTERN ROUTE. 
51 
miles into what is now the heart of the mountains, with isolated low 
ranges here and there projecting above their even surface. 
Then 
came a great uplift which finally raised the mountains to their present 
positions. 
On this uplifted mass of rock the streams, on account of 
their increased slope, were very active and at once began to cut deep 
trenches; these in time were widened where the rocks were soft, and 
finally all the higher land on the plains was cut away, but in the 
Sa at ray grade. The great 
f veins and the ever-present 
posits of ‘iit a rich shoot at 
some erto overlooked junction of 
ee ous eis has made the 
district a favorite field for lessees, and 
ma oN prizes ie been won by men 
working small blocks of ground leased 
from their owners. The great Inde- 
pendence mine, which made a fortune 
for Stratton and whose history consti- 
tutes one of the romances of mining, 
is now worked entirely by the leasing 
system. 
The erection f of the ag Creek 
district is shown by 
son, of the Geological Survey: 
Gold and silver produced in the Cripple Creek district, Colo., 1891-1920. 
Silver. 
Ore Lode gold Total 
Year. (short evelao). 14 Quest value. 
tons). Gas} Wale. 
ounces). 
1891... $1, | 1,930 
1802. 6297 557, poe 557, 851 
oe pee iis, 2,021, 088 5, 680 4,430 | 2,025, 518 
WS: a 2,618, 383 25, 335 15,961 | 2,634,349 
198.2200 | see) Sas] ity) Pas 
ee ee Se ? 
— 10, 131, 855 59,879 35,927 10/167, 782 
ee 13, 507, 349 67, 799 40,001 | 13,547,350 
ae 16,058, 564 82, 299 49,379 = 507, ae 
ier eto. 18,149, 645 80, 792 50, 091 , 199, 
oR es 17, 234, 294 89, 560 53, 736 17, 288, 080 
Ws = 4: 16, 932, 416 62, 780 34,273 16, 985,090 
a oe ccd 11, 840, 272 41, 605 22, 467 He 
1994s backs 7,819 | 14, 456, 536 47,817 | 71, 738 14, 494, 970 ; 
| 6,358 | 15,641, pes peste 137978. 727 
1906. _ | 702,069} 13,930, 67,943 o 3, ropes 
1907. . 451,082| 10,370, 51, 630 34,076 | 10, » 300 
1908... ==, 173 | 13,031,917 52,270 27, 703 ‘18, 050, 690 
eae 575,670 | 11, 466, 63, 204 32, 866 ao 
1919. . 688,941 | 11,002, 253 54, 263 = eG = 
1911__ 756,900 | 10,562, 653 57, 733 30, Lp 
1912. 849,172} 11,008, 362 66,117 40, 662 | 11,049, 024 
1913. 917, 406 0,905, 003 71,349 048 | 12, 364 
314. . 939, 423} 11,996,116 | 89,056 49,248 | 12,049,308 
1915. 948,082 | 13,683, 494 87, 767 rant | 12172001 
1916. 945,820} 12,119, 550 79, 804 ea rere 
WIZ... 1,084,656 | 10,394, 64, 568 oy ees | 8170 412 
1919. 996,328 |  Bagisio | gaui2| 397605 | | 5,867,511 
oD . , ? , 
Ey 448, 61 "998| 33,789 36,830) 4,360,828 
pis th Soe? 311,474,372 | 1,678,192 | 1,066,658 | 312,541,030 
Formerly a considerable part of the 
ore from the district was sent directly 
0 the smelters at Pueblo and Denver, 
Colorado Springs. The common prac- 
has been roasting and cyanida 
tion, but in the modern Victor mill 
of the 
Portland Gold Mining Co. con- 
centration is effected by 
the concentrates are treated by the 
process. 
cyanide 
