BULLETIN 707 PLATE LXX 
U. S. GEOLOGICAL SUR\ 
Last 
SPIRES OF VOLCANIC ROCK NEAR SAPINERO. 
Much of this countr 4S once covered with ink anic tuff consisting of fragments of 
lava of all sizes, whic ‘h is bedded like shale or cl It is soft and is re adily cut by 
rain and streams into beautiful and fantastic “Seni . Photograph by Willis T. Lee. 
B. INTRICATE EROSION OF VOLCANIC ROCK. 
This mass of volcanic tuff is so dissected by rain erosion that it consists only of numbe = 
pe 28s s and pinnac sth It makes ‘pic turesque cliffs that are — tc pounabs Similar shee 
of tuff cover the hills on both sides of Gunnison Valley hotograph by Willis T. Le 
C. SHEEP IN THE GUNNISON COUNTRY. 
Many sheep are pastured in the Gunnison country. In midsummer they reach the 
higher slopes of the mountains, as shown in this view. Photograph by J. F. Hunter. 
