10 
FAIRBANKS AND RAMPART QUADRANGLES. 
edge of the Yukon Flats. The mapping of the areas marked with 
broken contour lines immediately north of Tanana River, in the south- 
eastern part of the quadrangle, is to be completed during 1907. The 
town of Fairbanks is the main supply point for the creeks of the 
Fairbanks placers, and its name lias been given to the quadrangle. 
In the Rampart quadrangle the mapping of the area between the 
western boundary of the Fairbanks quadrangle and the confluence of 
fc 
Rampart quadrangle Fairbanks quadrangle Circle quadrangle Fortymile quadrangle 
Fig. 1. — Index map showing location of quadrangles in the Yukon-Tanana region. 
the two rivers has been completed. This includes all the areas of 
economic interest in the Rampart quadrangle and finishes the western 
portion of the interstream area. In the preparation of the report 
which lias been written to accompany these maps free use has been 
made of the other publications of the Survey bearing upon the areas 
under consideration. The material for the account of the Fairbanks 
region has been taken largely from the progress reports for 1905 
" Brooks, Alfred H., and others, Report on progress of investigations of mineral resources 
of Alaska in 1905 : Bull. U. S. Geol. Survey No. 284, 1906, pp. 109-123, and Bull. No. 
314, 1907, pp. 36-31. 
