Mondo Knows Facts
A tombolo ties an island to the shore
Sand accumulates in the calmer water behind an island until a ridge connects the two Waves bend around an offshore island and lose energy in its lee, so sediment settles there. Over time the deposit grows into a neck of land. Chesil Beach in Dorset and the isthmus at St Michael's Mount are often cited as examples. It sits in Mondo's world geography collection, one of 200 facts that each trace back to the reference below.
Where this comes from
Facts that can change over time are reviewed and updated. If something here looks wrong, Mondo would rather know than be confidently incorrect.
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More facts like this
Spits grow where sediment drifts along the shoreWaves approaching at an angle move sand sideways until it builds a finger of land into open waterThe Great Blue Hole is a drowned caveThe circular hole in the Belize reef is a collapsed limestone cavern flooded by rising seasMangroves and mudflats absorb storm energyDense roots and soft sediment slow waves before they reach the land behindSea level is not rising evenly around the worldLand sinking or rebounding changes local sea level far more than the global average in some placesNorway's coastline is longer than its land bordersMeasured around every fjord, Norway's mainland shore runs roughly 29,000 kilometresFjords are glacial valleys that the sea floodedIce cut the valleys below sea level, and when it melted the ocean moved in
🗺️ World Geographyfact 176 of 200
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Tags: coastlines, islands, landforms
A tombolo ties an island to the shore: the short answers
- Where does this come from, and can I check it?
- Sand accumulates in the calmer water behind an island until a ridge connects the two. The figure is taken from USGS, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.
- Is this really a world geography fact?
- Yes. It sits on the World Geography shelf, one of 2,600 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.
- What else can I read about it?
- The links under the fact point to a quiz, game, puzzle or calculator on the same subject, and the shelf below shows related facts. The wording here is original, and quoted phrases are marked as quotations.