Main Page | See live article | Alphabetical index A tombolo is a deposition landform which connects an island to the shore. These usually form because the island causes wave refraction, depositing sand and shingle carried in suspension where the waves meet. Long Shore Drift may also contribute material, or even be the principal contributor of material, as in the case of Chesil Beach which connects the Isle of Portland to Dorset in England. External links Geology.About.com's page on tombolos (useful for its descriptive photograph) Photograph: Chesil Beach Photograph: Chesil Beach and the Isle of Portland This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.