established: 
Stratigraphic Unit Color 
  
l. Zabriskie quartzite "Salmon pink", rusty, pale 
(Wheeler, 1948) pastel tones 
2. Undesignated Buff, orange, neutral green, 
gray 
3, Algal limestone Dark gray 
Color-photograph study showed that this same color 
Sequence is present 5 miles northwest at the range front in 
Juxtaposition with strata known to be of Tertiary age. Iden- 
tifications were based entirely upon similar colors because 
direct tracing methods could not be used, This correlation, 
placing strata of Early Cambrian age at the range front, was 
substantiated by field traverse. 
Problem 2 
Color-photograph study of an area adjacent to the 
locality mentioned in problem 1 (Echo Canyon) showed an 
interruption in the color sequence, Unit 2 was apparently 
absent and unit 5 appeared to be resting upon unit l. A 
low-angle fault was suspected, although the fault could not 
be seen in the vertical view, and the trace of the proposed 
fault was manifested only by the color anomaly. A field 
investigation of this anomaly proved the presence of the 
low-angle fault, 
Problem 3 
Color-photograph study of two flight strips over 
strata of Paleozoic age indicated that many high-angle 
faults are present, as the color sequences are offset. Cor- 
relations between offset color sequences were easy to es- 
tablish, In many places the magnitude of the relative 
displacement could also be determined. Available time did 
not permit detailed field checking. 
Problem + 
A characteristic over-all color, as seen in the 
aerial photography, may be correlative with a formation, but 
this color may not be shown by the hand specimen, because