File:The national parks portfolio (1917) (14782712495).jpg

Identifier: nationalparkspor1917yard (find matches)
Title: The national parks portfolio
Year: 1917 (1910s)
Authors: Yard, Robert Sterling, 1861-1945 United States. National Park Service
Subjects: National parks and reserves
Publisher: Washington, D.C. : U.S. G.P.O.
Contributing Library: Harold B. Lee Library
Digitizing Sponsor: Brigham Young University

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Text Appearing Before Image:
EVERAIv days may profitably be spent upon the rim of the lake,which one may travel afoot or on horseback. The endless varietyof lava formations and of color variation may be here studied tothe best advantage.The tem.perature of the water has been the subject of much investigation.The average observations of years show that, whatever may be the surfacevariations, the temperature of the water belov/ a depth of three hundred feetcontinues approximately 39 degrees the year around. This disposes of thetheory that the depths of the lake are affected by volcanic heat. Apart from its attractive scenic features, writes J. vS. Diller of the UnitedStates Geological Survey, Crater Lake affords one of the most interestingand instructive fields for the study of volcanic geology to be found anywherein the world. Considered in all its aspects, it ranks with the Grand Canyonof the Colorado, the Yosemite Valley, and the Falls of Niagara, but with anindividtiality that is superlative.
Text Appearing After Image:
Photograph by Fred H. Kiser, Porllaitd, Oregon Sand Creek, Showing Pinnacles Resulting From Erosion

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