U. S. GEOLOGICAL SURVEY 
ULLETIN 707 PLATE XI 
A. GRAND CANYON OF THE ARKANSAS BELOW TEXAS CREEK. 
Below Texas Creek the canyon in many plac y rough and rugged, the m sive granite 
projecting : from ie walls on either side seems ph to bar the pathway 0 es river, and 
these spurs are crowned with crags and pinnacles. Photograph by Marius re Campbell. 
B. TUNNEL ON RAINBOW HIGHWAY. 
“ale a the tion of the Rainbow Hig ghway mduobrg engineering difficulties : those which 
thr ag railroad engineers in 1881. Mu 2 cutting was done, and eve ge mine ahs were driven 
roug 
ugh the projecting points of massive granite. Photograph by Marius R. Campbell 
