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 essential of a great actor is that he loves himself in acting.”
—Charlie Chaplin (1889–1977)
“So in your discussions of the nuclear freeze proposals, I urge you to beware the temptation of pride—the temptation blithely to declare yourselves above it all and label both sides equally at fault, to ignore the facts of history and the aggressive impulses of an evil empire, to simply call the arms race a giant misunderstanding and thereby remove yourself from the struggle between right and wrong, good and evil.”
—Ronald Reagan (b. 1911)