and the soft, over-leaning edges of the moss-mantle grow over and unite finally, preserving the ice from future action of the summer sun, or even from the infiltration of water from above, unless exposed anew by further cracking. The tundra is cracked in every direction, and slight depressions, or some difference in the vegetation, indicate the location and extent of the fissures, and when traced forward to the edge of the bluff a cross section is seen, perhaps from 2 to 4 ft. wide or more. The edges of the tundra mass and peat seem to be pressed by the expansion of the ice and perhaps also by its settling as decomposition and consolidation goes on, thus giving the stratified peat an upward bend where frozen to the edges of the ice,
Original journal dimensions: 11.5 x 21 cm.
Holt-Atherton Special Collections, University of the Pacific Library
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John Muir, journals, drawings, writings, travel, journaling, naturalist