Compared with cascades and falls, avalanches are short-lived, few of them lasting more than a minute or two, and the sharp clashing sounds so common in dashing water are usually wanting; but in their low massy thunder-tones and purple-tinged whiteness, and in their dress, gait, gestures, and general behavior, they are much alike.
The Yosemite - Chapter 3 (pp. 46-47), Sierra Club Books. 1988