Basic Facts of Geomorphology
However, the term "side valley" is used rather for higher order valleys near the mountains (example above: the Pennines), for the lower valleys often do not show a drastic relief. The reason is a simple one: The "mainstem river" (into which the secondary river flows) passes much more water than its tributaries and therefore
- has a lower current (see Hydrology)
- much more fine sediments
- which are deposed in a more flat matter.
The higher the order of a valley, the steeper usually are the hillsides resp. valley slopes. Looking upstream, the steepest slopes are normally near the source of a brook (with the exception of very hard rocks in downstream direction).
Read more about this topic: Side Valley
Famous quotes containing the words basic and/or facts:
“The basic idea which runs right through modern history and modern liberalism is that the public has got to be marginalized. The general public are viewed as no more than ignorant and meddlesome outsiders, a bewildered herd.”
—Noam Chomsky (b. 1928)
“A radical is one of whom people say “He goes too far.” A conservative, on the other hand, is one who “doesn’t go far enough.” Then there is the reactionary, “one who doesn’t go at all.” All these terms are more or less objectionable, wherefore we have coined the term “progressive.” I should say that a progressive is one who insists upon recognizing new facts as they present themselves—one who adjusts legislation to these new facts.”
—Woodrow Wilson (1856–1924)