File:The book of the national parks (1920) (14785526963).jpg

Identifier: bookofnationalpa1920yard (find matches)
Title: The book of the national parks
Year: 1920 (1920s)
Authors: Yard, Robert Sterling, 1861-1945
Subjects: National parks and reserves
Publisher: New York : Charles Scribner's Sons
Contributing Library: Harold B. Lee Library
Digitizing Sponsor: Brigham Young University

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Text Appearing Before Image:
ated than now when yousee it in its old age, sunk deep in its self-dug trench;and, while it is plucking backward and breaking off anever-increasing precipice above it, it is plucking down-ward, too. If the rock is even in structure, this down-ward cutting may be very nearly perpendicular, butif the rock lies in strata of varying hardness, shelvesform where the harder strata are encountered becauseit takes longer to cut them through; in this way areformed the long series of steps which we often see inempty glacial cirques. By this process of backward and downward pluck-ing, the Carbon Glacier bit its way into the north sideof the great volcano until it invaded the very founda-tions of the summit and created the Willis Wall whichdrops avalanches thirty-six hundred feet to the glacierbelow. Willis Wall is nearly perpendicular becausethe lava rock at this point was homogeneous. But inthe alternating shale and limestone strata of GlacierNational Park, on the other hand, the glaciers of old
Text Appearing After Image:
From a photograph by Asahel Curtis MOUNT RAINIER AND PARADISE INN IN SUMMER

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