U. S. GEOLOGICAL SURVEY BULLETIN 845 PLATE 38 
- MUD VOLCANOES SOUTHWEST OF NILAND, CALIF. 
Boiling mud ae heated by buried volcanic rocks. The water is believed to rise on the 
San Andreas fault. 
phaser OF ANCIENT LAKE CAHUILLA 
DE OF SALTON BASIN, CALIF. 
B. TRAVERTINE DEPOSIT MARKING 
NEAR FIGTREE JOHN SPRING, ON soUuT 
Santa Rosa Mountains at ats (Mendenhall.) 
