The guardians of the Columbia, Mount Hood, Mount Adams and Mount St Helens . that organization. Apart from these ridges, the entire rim is missing; but below the spectator,at what must have been the center of its circle, towers a great cone of lava,harder than the andesitic rocks and the scoriae which compose the bulk of themountain. This is known as Crater Rock. Itis the core of the crater, formed when the moltenlava filling its neck cooled and hardened. Aroundit the softer mass has worn down to the generalgrade of the south slope, which extends fivemiles from just below the remaining north r
The guardians of the Columbia, Mount Hood, Mount Adams and Mount St Helens . that organization. Apart from these ridges, the entire rim is missing; but below the spectator,at what must have been the center of its circle, towers a great cone of lava,harder than the andesitic rocks and the scoriae which compose the bulk of themountain. This is known as Crater Rock. Itis the core of the crater, formed when the moltenlava filling its neck cooled and hardened. Aroundit the softer mass has worn down to the generalgrade of the south slope, which extends fivemiles from just below the remaining north rimat the head of the glaciers to the neighborhoodof Government Camp, far down on the Cascadeplateau. The grade is much less than thirtydegrees. Over the slope flow down two glaciers,the Zigzag on the west, and the White Riverglacier on the east, of Crater Rock. It is sometimes said that the south side ofthe old summit was blown away by a terrificexplosion. That is improbable, in view of Crater Mount Hood lh Rock, which indicates a dormant volcano when (l. washingtonianum). 82 THE GUARDIANS OF THE COLUMBIA the south side was destroyed. The mountain was doubtless rent by ice ratherthan by fire. The mass of ice and snow in and upon the crater broke apartthe comparatively loose wall, and pushed its shattered tuffs and cinders fardown the slopes. Forests were buried, old canyons were filled, and the wholesouthwest side of the mountain was covered with the fan-shaped outwashfrom the breach. Through this debris of the ancient crater the streams at thefeet of the glaciers below are cutting vast ravines which can be seen from theheights above. (Seeillustrations, pp. 77-81.)The central situationof Mount Hood makesthe view from its sum-mit especially worthseeking. From the Pa-cific to the Blue Moun-tains, south almost tothe California line, andnorth as far, it embraces
Size: 1360px × 1836px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookidguardiansofc, bookyear1912
