78 CONTRIBUTIONS TO ECONOMIC GEOLOGY, 1902. [bull. 213. 
found iD paying quantities, and, as will be noted later, this is approxi- 
mately the area in which the gold-quartz veins have been discovered. 
From the outcrops of these ledges the gold and quartz have been 
detached and washed down into the beds of the streams, where the 
heavier metal soon became covered by the rounded bowlders and 
pebbles with which the channel became filled. The conditions under 
which the gold was washed into the streams probably differed little 
from those of to-day, except that the streams were then filling up 
their valleys. 
Peshastin district. — The gravel deposits in the valley of the Peshas- 
tin are less extensive than in the Swauk district. The alluvial filling 
of the canyon-like valley of the upper half of Peshastin Creek is not 
as deep and does not show the well-marked terraces so prominent in 
the Swauk Valley. The gravel appears to be gold bearing through- 
out, and the gold is quite uniform in distribution. The largest 
nuggets are found on the irregular surface of the pre-Eocene slate 
which forms the bed rock. While the largest nuggets found in the 
Peshastin placers are less than an ounce in weight, and therefore not 
comparable with some of the Swauk gold, the Peshastin gold is fairly 
coarse and easily saved. The gold is high grade, being worth about 
$18 an ounce. 
The principal claims on the creek, below Blewett, are owned by the 
Mohawk Mining Company, which is hydraulicking the gravels with 
water from the upper Peshastin and from Negro Creek. Work which 
has been done on Shaser Creek shows the gravels to be gold bearing, 
and here also the gold is high grade. This fact is interesting, since, 
while the Shaser Creek drainage basin is almost wholly in the same 
formation as that of the Swauk Basin, the gold found in the two 
creeks is quite different, the Swauk gold containing a considerable 
amount of silver. 
GOLD-QUARTZ VEINS. 
Peshastin (list rid. — A few T mines in the vicinity of Blewett have 
been producers for about twenty-five years. The many changes of 
management and methods of operating these properties, however, 
make it impossible at the present time to determine accurate^ the 
character of the ore that has been mined, or to estimate even approxi- 
mately the product during this period. Much of the ore has been 
low grade, and the gold has been extracted by means of arrastres, 
stamp mills, and a small cyanide plant, but not always with very suc- 
cessful results. The small stamp mill first built in this district was 
the first erected in the State of Washington. Another mill, with 20 
stamps, has lately been rebuilt under the Warrior General manage- 
ment. 
The best-known property in the district is the Culver group, com- 
prising the Culver, Bobtail, and Humming Bird claims, and now known 
