A land bridge is an isthmus or other land connection joining two otherwise separate landmasses, letting plants and animals migrate between them. Most form when falling sea levels during an ice age expose part of the continental shelf, though some, like the Isthmus of Panama, arise instead from tectonic uplift. The Bering Land Bridge periodically linked Alaska and Siberia as ice-age sea levels fluctuated, and the Isthmus of Panama's emergence roughly three million years ago opened the Great American Biotic Interchange between North and South America.
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Source Land bridge (Wikipedia)
Source Land bridge (Wikipedia)
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Source Land bridge (Wikipedia)
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Land bridge (Wikipedia)
Caused By: Plate Tectonics, Article text
A land bridge can be created by marine regression, in which sea levels fall, exposing shallow, previously submerged sections of continental shelf; or when new land is created by plate tectonics; or occasionally when the sea floor rises due to post-glacial rebound after an ice age.
Caused By: Post-Glacial Rebound, Article text
A land bridge can be created by marine regression, in which sea levels fall, exposing shallow, previously submerged sections of continental shelf; or when new land is created by plate tectonics; or occasionally when the sea floor rises due to post-glacial rebound after an ice age.
In Discipline: Geomorphology, Lead paragraph
In biogeography, a land bridge is an isthmus or wider land connection between otherwise separate areas, over which animals and plants are able to cross and colonize new lands
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