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An oxbow is a U-shaped wooden or metal frame that fits under and around the neck of an ox or bullock, with its upper ends passing through the bar of the yoke and held in place with a metal key, called a bow pin. The wood most often used is hardwood steamed into shape, like elm or hickory and sometimes willow. A ring is attached by a plate to the centre underside of the yoke, to enable a pair of bullocks to be chained to other pairs in a team and thence hitched to the load.
When rivers meander and are sometimes cut off from their course, they form an oxbow lake which is so named because of the distinctive "U" shape.
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Oxbow lake
An oxbow lake is a U-shaped body of water that forms when a wide meander from the main stem of a river is cut off, creating a free-standing body of water. This landform is so named for its distinctive curved shape, resembling the bow pin of an oxbow. In Australia, an oxbow lake is known as a billabong, from the indigenous language Wiradjuri. In south Texas, oxbows left by the Rio Grande are called resacas.
The word "oxbow" can also refer to a U-shaped bend in a river or stream, whether or not it is cut off from the main stream.
Geology
An oxbow lake forms when a river creates a meander, due to the river's eroding the bank through hydraulic action, abrasion and erosion. After a long period of time, the meander becomes very curved, and eventually the neck of the meander becomes narrower and the river cuts through the neck during a flood, cutting off the meander and forming an oxbow lake.
When a river reaches a low-lying plain, often in its final course to the sea or a lake, it meanders widely. In the vicinity of a river bend, deposition occurs on the convex bank (the bank with the smaller radius). In contrast, both lateral erosion and undercutting occur on the cut bank or concave bank (the bank with the greater radius.) Continuous deposition on the convex bank and erosion of the concave bank of a meandering river cause the formation of a very pronounced meander with two concave banks getting closer. The narrow neck of land between the two neighboring concave banks is finally cut through, either by lateral erosion of the two concave banks or by the strong currents of a flood. When this happens, a new straighter river channel is created and an abandoned meander loop, called a cutoff, is formed. When deposition finally seals off the cutoff from the river channel, an oxbow lake is formed. This process can occur over a time scale from a few years to several decades and may sometimes become essentially static.
Oxbow (surfwear)
Oxbow is a brand of clothing and athletic equipment. Since its creation in 1985 in Pont-Audemer, France, Oxbow has positioned itself in the world of boardsports as an international brand. Oxbow restarted the World Longboard Championship in 1992, and sponsors athletes such as surfer Laird Hamilton and windsurfer Jason Polakow. Oxbow's Back to Powder winter event draws some of the best skiers and snowboarders in the world. The business is involved in five sports: surfing, windsurfing, kitesurfing, snowboarding, and skiing. Oxbow became an affiliate of the French group Lafuma in 2005.
