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What is a lake formed when an old river bend is cut off called?

Answer and explanation

Correct answer: Oxbow lake

The direct answer is C: an oxbow lake. A meander is a large bend or curve in a river channel. In a winding river, erosion commonly acts on the outer bank while deposition can occur on the inner bank. Over time, the bend becomes more pronounced and the narrow strip of land between its ends may be cut through, especially during high flow. The main river then follows the shorter, straighter channel, leaving the former bend separated from the river as a curved or horseshoe-shaped lake. That is an oxbow lake. Option A, a lagoon, is generally a shallow water body separated from the sea by a bar or reef, not a cut-off river bend. Option B, a glacial lake, is formed by glacier action. Option D, a tectonic lake, forms because of movements or faulting of the Earth’s crust. Option C is therefore correct. Memory cue: a cut-off meander looks like an oxbow.

Related tags

DrainageRiversOxbow-Lake

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