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The Dory Rips is a phenomenon involving extreme tidal agitation of waters located in the Bay of Fundy off the headland of Cape d'Or in Nova Scotia, Canada. The phenomenon occurs at the entrance to the Minas Basin , which is known for the globe's highest tides.
The Bay of Fundy (French: Baie de Fundy) is a bay between the Canadian provinces of New Brunswick and Nova Scotia, with a small portion touching the U.S. state of Maine. It is an arm of the Gulf of Maine. Its tidal range is the highest in the world. [1] The name is probably a corruption of the French word fendu, meaning 'split'. [2]
An 1830 map showed the "Quoddy Hell-Gate" of "dangerous whirlpools" off the southern tip of Deer Island. The whirlpool is caused by local bathymetry and a 20-foot (6.1 m) tidal range [1] where waters exchange between Passamaquoddy Bay and the Bay of Fundy, combined with the topography of the location's sea floor at the confluence of the numerous local currents through channels and over small ...
The Bay of Fundy fills and empties with approximately 160 billion tonnes of water twice a day. On average it takes 6 hours and 13 minutes between high and low tide. As soon as the tide has reached its lowest or highest point, it will change directions, and either begin to come to shore or flow back out.
The waters of Minas Bay exchange with the main part of the Bay of Fundy through the Minas Channel which flows between Cape Split and Cape Sharp, creating extremely strong tidal currents. Near Cape d'Or, the turbulent collision of currents is known as the Dory Rips .
Due to the extreme tidal range of the Bay of Fundy, the base of the formations are covered in water twice a day. It is possible to view the formations from ground level at low tide. The formations consist of red-brown sedimentary conglomerate, sandstone, and minor mudstone rock from the Carboniferous Hopewell Cape Formation, part of the Mabou ...
Famous examples of this effect are found in the Bay of Fundy, where the world's highest tides are reportedly found, and in the Bristol Channel. Less well known is Leaf Bay, part of Ungava Bay near the entrance of Hudson Strait ( Canada ), which has tides similar to those of the Bay of Fundy . [ 2 ]
The tide has an average range of 18.4 feet (5.6 m) (and range that can exceed 26 feet) and there are strong currents as large volumes of sea water flow into and out of the bay twice a day. [1] The bay is very shallow with the average depth being about 10 metres (33 ft) and about one third of its area is exposed at low water. [2]