ILLUSTRATIONS
Reading edition
FIGURE Page
52.—Index map showing location of Devils Tower National Monument 2
53.A.—Northwest side of Devils Tower showing how the columns taper or converge and in places unite near the top and are cut by numerous cross-fractures 4
B.—Southwest corner of Devils Tower showing the columns flaring out and merging to form the massive base 4
54.—Generalized section of the sedimentary rocks of the Devils Tower National Monument 6
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