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What are Valleys?

nValleys are long, low areas with 2 valley walls between mountains or hills.
nThey have slightly downward sloping floors, and a bottom of varying width.


Types of Valleys

There are three main types of valleys: V-shaped valleys

                                                                                                                   U-shaped valleys
                                                                                                                                       River plain valleys


Each type of valley is formed by erosion.
Many have river channels along the valley floor.
V-shaped valleys and river plain valleys are formed by flowing water.
U-shaped valleys are formed by flowing ice, or glaciers.