Most streams move through a series of bends
known as meanders. Meanders are always migrating across
the floodplain, by the process of the deposition of the point
bar deposits, and the erosion of the bank on the opposite side
of the stream with the fastest flow. The erosion typically
occurs through slumping of the stream bank. Meanders typically
migrate back and forth, and also down-valley at a slow
rate. If the downstream portion of a meander encounters a
slowly erodable rock, the upstream part may catch up and cut
off the meander. This forms an oxbow lake, which is an elongate
and curved lake formed from the former stream channel.
meandering stream See MEANDER.
mechanical weathering See WEATHERING.
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