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June 30, 1915 
Canada 
Geological Survey 
Museum Bulletin No* 15 
GEOLOGICAL SERIES, No. 26. 
Gay Gulch and Skookum Meteorites, 
By R. A. A. Johnston. 
The meteorites which form the subject of this article are 
two irons discovered in the course of gold mining operations on 
two of the gulches tributary to the Bonanza Creek system, 
Klondike mining district, Yukon, Canada. 
GAY GULCH. 
The first of these meteorites was found in 1901 in one of the 
sluice boxes on No. 6 claim on Gay gulch— latitude 63° 54"* N. 
longitude 139° 16' W. — and was obtained by the Geological 
Survey from Mr. J. B. Tyrrell, mining engineer, in 1906. Gay 
gulch, as may be seen from the diagram, enters Eldorado creek 
from the eastward at a point a little more than 3 miles in a direct 
line above the junction of the latter with Bonanza creek, or a 
little less than 13 miles in a south-southeasterly direction from the 
town of Dawson. Here, as on other gulches in the district, the 
gravels — white channel gravels — lying on bed-rock were being 
washed for gold, and the specimen must, therefore, have been 
lying either in contact with bed-rock or at the most not more 
than 2 or 3 feet above it. Emphasis is laid upon this fact here 
as it has an important bearing on the discussion, to follow later, 
on the probable geologic age of the meteorites under consider- 
ation. 
The Gay Gulch iron, previous to the removal of a small end 
piece, weighed 483 grammes. The general form and size of the 
