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This picture of the Nowitna River in Alaska shows two oxbow lakes – a short one at the bottom of the picture and a longer, more curved one at the middle-right. The picture also shows that a third oxbow lake is probably in the making: the isthmus or bank in the centre of the most prominent meander is very narrow – much narrower than the width of the river; eventually, the two sections of ...
Meander scars, oxbow lakes and abandoned meanders in the broad flood plain of the Rio Negro, Argentina. 2010 astronaut photo from ISS. A meander scar, occasionally meander scarp, [1] is a geological feature formed by the remnants of a meandering water channel. They are characterized by "a crescentic cut in a bluff or valley wall, produced by ...
An oxbow lake forms after there has been deposition of sediment, by the new cutoff channel flowing adjacent to it, at the entrances of the abandoned bend; this seals the bend off from the rest of the river. Oxbow lakes have been shown to be an important habitat for various species of wildlife. Recent efforts have been made to protect these ...
Bishazari Tal, also spelled Beeshazar Tal, is an extensive oxbow lake system in the buffer zone of the Chitwan National Park, a protected area in the Inner Terai of central Nepal. This wetland covers an area of 3,200 ha (7,900 acres) at an altitude of 286 m (938 ft).
Also called Indianite. A mineral from the lime-rich end of the plagioclase group of minerals. Anorthites are usually silicates of calcium and aluminium occurring in some basic igneous rocks, typically those produced by the contact metamorphism of impure calcareous sediments. anticline An arched fold in which the layers usually dip away from the fold axis. Contrast syncline. aphanic Having the ...
A slough can form when a meander gets cut off from the main river channel creating an oxbow lake that accumulates with fine overbank sediment and organic material such as peat. This creates a wetland or swamp environment. One end of the oxbow configuration then continues to receive flow from the main channel, creating a slough. [13]
A billabong is often defined as an oxbow lake, an isolated crescentic pond left behind after a river loop is cut off when the river channel changes course. [ 7 ] Merriam-Webster defines the word as: "1.
An old fallacy exists regarding the formation of point bars and oxbow lakes which suggests they are formed by the deposition (dropping) of a watercourse's suspended load claiming the velocity and energy of the stream decreases toward the inside of a bend.