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98 uplifting of the mtns. no dislocation no [disturbance] of the grand [quesing] of nature. had there been any change of level these admirably inscribed water lines would have indicated the fact. That the sculpture of the mtns was effected prior to the existence of the lakes is shown by the fact that the sculpture of the [submerged ] feet of the mtns is symmetrical with the elevated portions. for [although] glaciers run their eroding snows down into the [water]. There is still always a slight difference in the erosion accomplished by the uplifting of the water & in the case of [water] stream erosion it is instantly checked as soon as its force is dissipated on [entering] the lake. Now in fact there is no appreciable difference in the submerged & elevated sculpture.
99 In the glacial erosion of most lavas there is some difficulty in discriminating between the effects of water. Yet upon the whole there can hardly be any doubt that gls [glaciers] were the sculpturing agents of all the Nevada ranges. & this sculpture was effected before the existence of the great lakes. probably the lakes were all icy seas in the first place just as the [smaller] gl lakes of the Sierras were first filled with ice Recent volcanic activities becomes more & more rare as the distance from the Sierra increases to the Eastward. So also the gl action becomes more [ ]. Still as far as gl action is concerned, the difference between the sculpture of the north & S
Date Original
1878
Source
Original journal dimensions: 10 x 17 cm.
Resource Identifier
MuirReel25Journal06P098-099.tif
Publisher
Holt-Atherton Special Collections, University of the Pacific Library
Rights Management
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Keywords
John Muir, journals, drawings, writings, travel, journaling, naturalist
