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Index
Map of 1°x2° Topo Maps
These maps cover 1 degree of latitude by 2 degrees of longitude
and are the standard series for intermediate-scale geologic mapping.
In this series, one inch on the map represents 250,000 inches,
or about 4 miles, on the ground.
Alphabetical list of quadrangles
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Move your mouse over area on the index map to view quadrangle
name below.
Scale = 1:250,000
1 inch = about 4 miles
Contours and elevations
are in feet.
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