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The great effect of the tides on the waters of the Bay is evident in where the sea meets the region's rivers.
The Saint John River System
The Reversing Falls
The Bay of Fundy meets the Saint John River within Saint John Harbour. Water levels are equal precisely half way between low and high tides, which is called "slack tide". The river falls into the Bay at low tide, producing wild rapids. At high tide, the ocean waters push their way against the river's current. Effects of the tide on the river system extends as far as 50km upstream.
Coastguide http://www.mcuniverse.com/The_Reversing_Falls.1207.0.html http://www.greatcanadianrivers.com/rivers/john/species-home.html
The Tidal Bores
In addition to the reversing falls the Fundy tides create the phenomena of the Tidal Bore. The waters narrow into two prongs at the inner most part of the Bay - one leading to Moncton, the other to Truro. When the rising waters of the Bay meet the narrowing of the land a "tidal wave" of usually 3 feet occurs.
http://www.fundyforum.com/bore.html http://w3.execnet.com/lrs/novascotia/TidalBore/TidalBore.htm http://www.petitcodiac.org/riverkeeper/english/tidalbore/tidalBore.htm
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