UTAH ACADEMY OF SCIENCES 85 
USE OF UTAH ASPHALTS. 
An investigation into the uses which are made of the 
asphalts of Utah shows them to me surprisingly numerous 
and varied. That there are large deposits of rock asphalt 
in Utah is known by comparatively few, and to still fewer 
is known the extended use which is made of them. Many 
of our most common articles are products of Utah asphalts. 
Their use has increased enormously during the last few 
years, yet the supply is still short of the demand. Before 
the discovery of gilsonite in Utah, European and Asiatic 
asphaltum was shipped into the United States; now, be- 
cause of its abundance and purity, large quantities of the 
Utah asphalt are shipped to the foreign countries. 
The production of gilsonite in the last two years has 
increased rapidly due to the greater number of articles made 
from it. In 1910 the production was 30,000 tons!®; in 
1912 over 50,000 tons. This is worth about $20.00 per ton 
f. o. b. Utah, which would mean an annual income of 
$100,000. 
Ozokerite is of still greater value, the price in New 
York being 15 to 28 cents per lb.2° The only available data 
as to production is that of the Soldier Summit mine. Here 
the total production to date has been 300 tons of the re- 
fined black ozokerite marketing at from $400 to $500 per 
ton, or a total value returned of between $120,000 and 
$135,000. 
Wurtzellite is little used because of its insolubility. 
There are about 1000 tons produced annually. 
Perhaps the most extended use which has been made 
of Utah asphalts is in the paving industry. Yet the value 
of gilsonite and ozokerite for other purposes are so great 
as to make it impractical to use them for paving. Gilsonite 
has been used in paving the streets of many important 
cities. Among these is a long stretch of Michigan Avenue 
Boulevard, Chicago”, where it is giving entire satisfaction 
under the most exacting requirements.” Rock asphalt has 
~H. L. A. Culmer, Address, Nov. 15, 1912. 
20Salt Lake Mining Review, Oct. 15, 1912. 
21H. L. Culmer, Address, Nov. 15, 1912. 
