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THE POPULAR SCIENCE MONTHLY.
rocks, or sandy clays and shales, of which the hills are composed, are interstratified with occasional harder beds, the slopes are terraced; and when these thinly-bedded, though harder, rocks prevail, the ontlines
Fig. 1.—Generalized section through the Uinta Mountains from North to South.
of the topography are changed, and present angular surfaces, and give rise to another type of topographic features, which I have denominated Alcove Lands,
