604 
14FEB74 
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1 4 Ij.l 0 8 0 - 5 Z 
4 4 - — 1 5 1.1.10 3 0 - 4 
€■ MSS-6 -D SUN EL25 A2149 196-7961-P-2-A-P-1L OCRS E-1571-15412-{ 
NOT PRECISION PROCESSED TRACK 11B FC 2127 NTS 41P 
FIGURE 1 A portion of the Canadian Shield in Ontario. 
(See commentary in text.)