Word: plateauing
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Dates: during 1890-1890
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...slopes for a certain height above the ice are rounded and striated with surprising verisimilitude, indicating the former extent of the glacier. The model of the torrent illustrates the early stages of valley growth, when the little head water branch streams are gnawing backwards with great rapidity into the plateau country above them. Landslides are thus produced, several of them being indicated both in the incipient stages of undercut and semi-detached masses, and later their catas trophic fall. The detritus carried by the torrent is opened out in a broad fan-delta of gentle declivity across the bottom...