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Meanders
What is it?
A meander is an extreme U-bend in a stream, usually occurring in a series, that is caused by flow characteristics of the water. Meanders form in stream-deposited sediments and may stack up upstream of an obstruction, resulting in a gooseneck or extremely bowed meander.
It is formed when the moving water in a river erodes the outer banks and widens its valley. A stream of any volume may assume a meandering course, alternatively eroding sediments from the outside of a bend and depositing them on the inside. The result is a snaking pattern as the stream meanders back and forth across its down-valley axis.
