Rawlins #6048E

This quad was flown in August and November 1977 and July 1978.
Both fixed-winged and rotary-winged aircraft were used. The southeastern
portion was flown with a rotary-wing in 1977 and most of the rest of 
the quad was flown in 1977 with a fixed-wing.  Four lines were 
flown in 1978.  

To add to the confusion, beginning in the fall of 1978, the original 
contractor took all the data from both aircrafts and both years and 
combined them.  The lines were probably renumbered at that time.  
A Julian date was given for the whole line even though portions were 
flown by different aircraft.  In the case of Rawlins, we were able 
to label each line with the year in which it was flown. 

The original publication may provide further clarification:

GeoMetrics, Inc., 1979, Aerial gamma ray and magnetic survey, Rock 
Springs, Rawlins, and Cheyenne quadrangles, Wyoming, and the Greeley 
Quadrangle, Colorado: U.S. Dept. Energy, Grand Junction Office 
Rept. GJBX-017(79), 5 vol.