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Tidal bore

A bore in Morecambe Bay, in the United Kingdom
Video of the Arnside Bore, in the United Kingdom
The tidal bore in Upper Cook Inlet, in Alaska

A tidal bore,[1] often simply given as bore in context, is a tidal phenomenon in which the leading edge of the incoming tide forms a wave (or waves) of water that travels up a river or narrow bay, reversing the direction of the river or bay's current. It is a strong tide that pushes up the river, against the current.

  1. ^ Sometimes also known as an aegir, eagre, or eygre in the context of specific instances in Britain.

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