What is the difference between a bridge and an arch?
A bridge crosses or “bridges” a watercourse; a stream, river, or any body of flowing water, at least intermittently. An arch does not have active water flowing underneath it. Bridges and arches are both formed primarily by water-based weathering and erosion. Arches often form within the apex of a rock alcove whereas brides evolve from erosion within a stream channel.
