187 Trees 6 ft [feet] dia [diameter] were growing along these river banks. In all these rivers wood drifted & decayed as in those of the present During the main gl [glacial] period, the climate seems to have so changed as to have compelled the gls [glaciers] to take refuge among the cool summits [when] allowing the growth of luxuriant forests. Then came an outbreak of hot lava melting the ice & causing floods by wh [which] the gravel was
188 swept down from the higher & steeper channels to where the outopenings at the junctions of the principal forks caused the currents to move more slowly -- As soon as the main beds of the channel were filled the flood current would become more & more widely spread until capable of carrying only finer material. [The the [earth] cooled & the gl [glacier]] Then the lava came gradually further down covering many of the deposits it had caused At length the [earth] mtns [mountains]
Original journal dimensions: 9 x 14.5 cm.
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John Muir, journals, drawings, writings, travel, journaling, naturalist