U. S. GEOLOGICAL SURVEY BULLETIN 845 PLATE 46 
A. THE GREAT ARROW-SHAPED SCAR IN THE MOUNTAIN SIDE AT ARROW- 
HEAD SPRINGS, ON SOUTH SLOPE OF SAN BERNARDINO MOUNTAINS, CALIF. 
B. UPTURNED LATE TERTI geri 
STRATA IN CAJON PASS, NORTHWEST OF SAN 
ERN ARDINO, CALIF. 
