The U-shaped valleys that are left by glaciers (fig 4) are much different in size and shape than preglacial V-shaped valleys.
(The U-shaped valleys; are left; by glaciers) (The U-shaped valleys that are left by glaciers (fig 4); are; much different in size and shape than preglacial V-shaped valleys)
The U-shaped valleys The U-shaped valleys that are left by glaciers (fig 4)
are left are
by glaciers
much different in size and shape than preglacial V-shaped valleys