"Planet Earth 
has a fur- 
nace inside," 
says Glen E. 
Campbell, 
Gulf ’s Geo- 
thermal 
Supervisor. “The heat is gen- 
erated by the natural radio- 
active decay of elements 
deep in the earth, and is con- 
ducted outward toward the 
surface. 
“But the earth's crust isn't 
the same thickness every- 
where. So in some places, this 
geothermal energy is buried 
miles deep, and in other 
places it comes right to the 
surface as volcanoes, geysers 
or hot springs. 
"In many areas of the world, 
including the western U.S., 
geothermal resources hot 
enough to generate electric- 
ity come fairly close to the 
surface. In one such area, at 
Steamboat Springs, near 
Reno, Nevada, Gulf and 
another energy company are 
working on various tech- 
niques for extracting heat 
from the earth and putting it 
to work generating electricity. 
“The potential is tremen- 
dous. Government figures 
show that the geothermal re- 
sources within the U S. could 
free roughly a million barrels 
of oil per day for other uses." 
Geothermal energy could 
be a big step toward energy 
independence. It's part of 
the business Gulf is in: energy 
for tomorrow 
Gulf people: 
energy for tomorrow. 
Gull Oil Corporation 1981 
Electricity from Earth’s body-heat. 
“Generating electricity from geothermal resources couia 
save America a million barrels of oil every day" 
