John Muir


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32 Alt [altitude] of avalanche back of Hutch 470 feet. Average slope 31°, extreme slope where has been spouted down narrow lane 36°

[drawing: heavier blocks sorted out by momentum; sand & smaller chips here; greatest descent]

These avalanches that are thus shot down narrow and rough-walled [slopes] slots are ground & rounded almost like moraine boulders. Fine dust is also formed thus like the dust of dried moraine mud. [Dust] of gullies in high Sierra thus formed. Channels of

33 snow streams, of rock streams, of water streams, of ice streams all different yet not always readily distinguished Trees cut off 100 ft above base tops falling upwards Some of old tops & old trunks to be seen [on Hutch avalanche]. When killed & how? Alt [top] Pohono on west side avalanche 4330 ˝ bottom of fall 4230 ˝ val [valley] 4000

Difference in alt [altitude] between head of old Mirror Lake & junction of Tenaya Crk [Creek] with river 130 ft

Bridal Veil shoots free from the upper part of wall by velocity [gained] in descending [long] slope above brink. Looking from top of [rock] avalanche on west side of fall about 100 ft above the base the under [side]

Date Original



Original journal dimensions: 10 x 16.5 cm.

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Holt-Atherton Special Collections, University of the Pacific Library

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John Muir, journals, drawings, writings, travel, journaling, naturalist