A waterfall is a point in a river or stream where water flows over a vertical drop or a series of steep drops. Waterfalls also occur where meltwater drops over the edge of a tabular iceberg or ice shelf.
Waterfalls can be formed in several ways, but the most common method of formation is that a river courses over a top layer of resistant bedrock before falling on to softer rock, which erodes faster, leading to an increasingly high fall. Waterfalls have been studied for their impact on species living in and around them.
Articles
- iStampGallery: Waterfalls of India
- Philatelic Database: Stamps of Vanuatu – Waterfalls (2014)
- Rainbow Stamp Club: Waterfalls of Papua New Guinea
- To The Victoria Falls
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