Bay of Fundy so-called "plaster war" of 1820. The Bay of Fundy's ports and basins became major shipbuilding and shipping centres in the 19th century. Led at first by shipbuilders such as James Moran of St. Martins, New Brunswick, shipbuilding spread to all shores of the Bay of Fundy. Shipbuilders such as Joseph Salter in Moncton and William D. Lawrence of Maitland, Nova Scotia constructed some of the largest sailing ships ever built in Canada. Among other accomplishments, Fundy ports produced the fastest ship in the world, the ship ; the largest wooden ship ever built in Canada, the ship ; and the
Bay of Fundy various rivers which empty into it. Near the mouth of the Saint John River, where it passes through the city of Saint John, is the famous Reversing Falls. Here the changing tide causes alternating strong upriver and downriver flows several times a day as the tidal cycle changes. A narrow granite gorge and rocky bottom heavily restricts waterflow and creates strong rapids that flow upriver at high tide, and downriver at low tide. Rivers in the upper Bay of Fundy have a smaller flow-rate than the Saint John, and a shallower slope. As a result, extensive mud flats are deposited