Assertion: river valley | /r/HasAspect | v-shaped profile
Facets:
value: typically
type: DEGREE
Source sentences:
text: River valleys are formed through the slow process of erosion by water over the course of centuries, and they typically have a V-shaped profile.
text: In polar areas and at high altitude, valleys may be eroded by glaciers; these typically have a U-shaped profile in cross-section, in contrast to river valleys, which tend to have a V-shaped profile.