42 mtn [mountain]. Have gained some light on the formation of gravel beds along inlet. The material is mostly sifted & sorted by successive rollings & washings back along the margins of the gl [glacier] tribs [tributaries] Where the supply is almost out beyond anything even saw elsewhere. Thus [sketch: slope of gl [glacier] margin; Margin ice]
The lowering of the surface of gl [glacier] always [leaves] a margin dead & buried beneath lat [lateral] mors [moraines] on account of protection from sunshine. Thus a valley is formed in the gl [glacier] edge [& as] clear ice one side or nearly so buried ice on the other. As melting goes on the valley increases in depth & width [grows deeper & wider] since both sides are being melted the landside [one] slowly. The protected dead ice in
Original journal dimensions: 8.5 x 13 cm.
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John Muir, journals, drawings, writings, travel, journaling, naturalist