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In geology, a dike or dyke is a sheet of rock that is formed in a fracture of a pre-existing rock body. Dikes can be either magmatic or sedimentary in origin. Magmatic dikes form when magma flows into a crack then solidifies as a sheet intrusion, either cutting across layers of rock or through a contiguous mass of rock.
The side of a levee in Sacramento, California. A levee (/ ˈ l ɛ v i / or / ˈ l ɛ v eɪ /), [a] [1] dike (American English), dyke (British English; see spelling differences), embankment, floodbank, or stop bank is an elevated ridge, natural or artificial, alongside the banks of a river, often intended to protect against flooding of the area adjoining the river.
From Wikipedia, the free encyclopedia. Redirect page. Redirect to: Levee
This category includes articles on barriers used to protect land from flooding by water, whether river or ocean. They may be named dikes, seawalls, levees, flood walls, etc. For volcanic dikes, see Category:Dikes (geology).
Current dikes are made with a core of sand, covered by a thick layer of clay to provide waterproofing and resistance against erosion. Dikes without a foreland have a layer of crushed rock below the waterline to slow wave action. Up to the high waterline the dike is often covered with carefully laid basalt stones or a layer of tarmac. The ...
Urk was then and is still today a fishing community and it served as a natural construction-island for both dikes as well as a base of operations for the later exploitation of the polder. Both ceased to be islands: Urk on 3 October 1939, when the dike reaching from Lemmer was closed and Schokland when the surrounding water was consequently drained.
A subsurface dyke is a structure that is built in an aquifer with the intention of obstructing the natural flow of ground water, thereby raising the ground water level and increasing the amount of water stored in the aquifer.
The Texas City Dike is a levee located in Texas City, Texas, United States that projects nearly 5 miles (8.0 km) south-east into the mouth of Galveston Bay. [1] It is flanked by the north-eastern tip of Galveston Island and the south-western tip of the Bolivar Peninsula .