Assertion: canyon's wall | /r/HasProperty | v-shaped
Facets:
Source sentences:
text: The walls of some canyons are V-shaped and ragged; the walls of others are steeper and almost
text: If their walls are made of rock that is softer and more vulnerable to erosion, those walls are likely to be less steep, V-shaped, and prone to landslides and slumps (a slump is the downward movement of blocks of material on a curved surface).