Layers of basalt are intercalated at various hori- 
zons throught the Artist Drive and Furnace Creek formations. 
One of these flows, the basalt flow at Ryan, thins rapidly 
to the northwest, It is a caprock exposure of considerable 
thickness and topographic relief in the southwest part of the 
area, and it is intercalated within the Funeral fanglomerate 
at some distance to the northwest, 
Strata of Paleozoic age are exposed in the Funeral 
Mountains and along the range front, and are remarkably 
persistent in rock type, thickness, and ground color, 
Representative uses of color aerial photographs 
Results of evaluating color aerial photography of 
the Furnace Creek Wash test area suggest the following uses 
of such photography in geologic study: 
1. Correlation of color sequences as seen on the color 
aerial photographs with sequences of undisturbed 
stratigraphic units, 
Recognition of structural complexity by interrup- 
tions within color sequences, 
Detection of faulting by offsets in color sequences, 
Identification of stratigraphic units that have a 
characteristic over-all color, 
Determination of marker beds by distinctive color 
of certain beds within a stratigraphic unit, 
Recognition of similar rock types, possibly of 
different ages, by color differences. 
Representative Problems 
Problem 
At a locality in Echo Canyon (Funeral Mountains) 
strata of Paleozoic age were identified in the field as being 
similar to upper strata of the Wood Canyon formation of 
Early Cambrian age in a locality 40 miles to the southeast. 
Correlations were based upon rock type, fossil evidence, and 
ground color. A color sequence (field-photograph) was