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(656) 
The exploitation of new areas, such as Labrador, is being pushed with vigor, 
and the techniques of airphoto interpretation are being used very extensively. 
These methods, combined with intensive ground checks of areas found promis- 
ing, are probably the only way in which the concessions can be checked within 
  
Fig. 2. Whitewater series — Sudbury Basin, Ontario. Sandstones or quartzites in axial 
region of basin show particularly well. Volcanic breccia and nickel irruptive in north- 
west corner. Scale 1” = 1 mile (1/63,360). 
Spartan Air Services Ltd. Photo 
the allowable time limits. However, old areas are receiving attention also, and 
as an example, we note that the Sudbury nickel-bearing region has been photo- 
graphed at both large and small scales and a number of new geological facts 
have been obtained from this photography, which was executed primarily for 
topographic mapping. 
The district of Thetford Mines, famous as an asbestos producing area, has 
recently been topographically mapped by phogrammetric methods. It may be 
predicted with confidence that geological map revisions will result from the 
geological interpretation of this photo coverage. 
As the results of many of the studies now underway become known, it is 
expected that greatly expanded use of the techniques of airphoto interpretation 
will take place, probably within the next five years. 
    
   
    
  
  
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