118 ALASKAN MINERAL RESOURCES IN 1904. [bull. 259. 
benches of either side. The creek has attracted considerable attention, 
and the area has been called from it "The Glenn Creek mining dis- 
trict/ 1 It has produced altogether about $275,000, and probably over 
$35,000 during the last summer (1904). The bed rock is a broken 
schistose slate, and the material on it, composed largely of angular slide 
rock with about 2 feet of gravel, varies from 3 to 10 feet in thickness! 
The pay dirt is from 2 to 3 feet in thickness and the gold is found also 
in crevices in the bed rock. The gold is well worn, often shotty, and 
some of it is rather line. Nuggets have been found worth over $90. 
The occurrence is probably due largety to secondary concentration. 
The ground is worked at present mostly by open cut. During the 
past season there were over 20 men working on the creek. 
Shirley bench. — Shirley bench, on the west of Glenn Creek and about 
150 feet above it, has produced considerable gold. The gravels vary 
from 2 to 9 feet in thickness. The material is mostly fine, but there 
are bowlders of quartzite and intrusive rock similar to that outcropping 
in the ridge at the head of Glenn and Rhode Island creeks. Gold is 
found all through the gravels and is well rounded and u shotty"in 
character. The ground is worked by open cut. Owing to the scarcity 
of water, a centrifugal pump was used to return the water from the 
tailings to the boxes. 
Rhode Island Creel' and Gold Run. — The ground on Rhode Islanc 
Creek is more favorable for drifting and no summer work was bcin< 
done. 
Gold Run drains a portion of the bench on the western side anc 
Hows into Rhode Island Creek. The depth to bed rock is 16 to 18 feet 
and the material is mostly well-worn quartzite, grit, and slate. Hen 
also the gold is shotty. A considerable amount was taken out during' 
the winter of 1903-1, but the ground is difficult to work on account 
of water. The occurrence is probably another case of secondary 
concentration. 
Omega Creek. — Omega Creek is about a mile west of Rhode lslan< 
Creek and is separated from it by a conspicuously flat-topped ridge, 
like that between Eureka and Glenn creeks. The creek flows at first 
south westward and bends round gradually toward the west. The vallej 
is limited on the southeast by a comparatively steep slope and on tin 
northwest b/y a slope of a bench-like character, which rises gradual! 
to the base of the ridge at the head of the creek. The bed rock \i 
schistose grit and slate, and the gravel is composed mostly of angulai 
fragments of these rocks with some quartzite and vein quartz. Th< 
occurrence of gold is interesting in that along with some smooth gol( 
there is a considerable quantity that is rough. The nuggets fouiK 
generally contain quartz. The creek became a producer during th< 
summer of 1903, and thus far work has been done on only a few claims. 
Thanksgiving Creek. — Thanksgiving Creek is about li miles west of 
Omega Creek. Gold was discovered here in February, L 903, and con- 
