natural bridge

natural bridge

Naturally created arch formation resembling a bridge. Most are erosion features that occur in sandstone or limestone. Some are formed by the collapse of part of a cavern roof. Others may be produced by entrenched rivers eroding through meander necks to form cutoffs. Still others are produced by exfoliation (separation of successive thin shells) and may be enlarged by wind erosion.


natural bridge or natural arch

This entry comes from Encyclopædia Britannica Concise.
For the full entry on natural bridge, visit

Seen & Heard

What made you look up natural bridge? Please tell us what you were reading, watching or discussing that led you here.