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Legend (Economy/Quaternary)

Base of Quaternary Structure Contours (North of Latitude 56 degrees) (1)
Quaternary Isopach Contours (North of Latitude 56 degrees) (2)
Glacial Drift Thickness (3)
0-50m 0-50m
50-100m 50-100m
100-150m 100-150m
150-200m 150-200m
200-250m 200-250m
250-300m 250-300m
Over 300m Over 300m