THE NAMING OF MOUNT HOLMES 1 UTAH 
In 1875-76 Professor G. K. Gilbert, -'.of the U. S. Geolo- 
gical Survey , explored the desert-like region bordering the 
Grand Canyon of the Colorado in southern Utah. He csmie upon 
a number of mountains the structure of which v^as new to him, 
the elevation of the mountain lying above the general surface 
of the country being due to the intrusion from the interior 
depths of masses of molten lava which did not reach the sur- 
face at the time, but spread out beneath the superficial strata 
pressing them upward in an arch creating a dome -shaped ele- 
vation or mountain. Subsequent erosion as in many c&ses carved 
the dome into irregular, rugged elevations exposing the lava 
core, often fantastically carved. These masses of lava were 
called laccolite-rlakes of stone-- by Mr. Gilbert. 
A V 
It happened that in 1875 while conducting the San J 
division of the Hayden Survey of the territories in southern 
Colorado I had observed and described &&&&$ of this particular 
mountain structure (See U. S. Geological Survey of the Terri- 
tories, 1875) and Mr. Gilbert recognizing my claim to priority in 
describing this peculiar form of mountain building, named one of 
the mountains of this type after me. The mountain group named 
after Professor Henry, first Secretary of the Smithsonian Insti- 
tution, includes a number of mountains of this type. 
The following extracts are from Mr, Gilbert's Report of 1877 
