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In Canada, the clay is associated primarily with the Pleistocene-era Champlain Sea, in the modern Ottawa Valley, the St. Lawrence Valley, and the Saguenay River regions. [4] Quick clay has been the underlying cause of many deadly landslides. In Canada alone, it has been associated with more than 250 mapped landslides.
The leda clay deposits found in Piperville inhibit major development, as the clay liquifies from stress caused by immense weight. This has limited structures to two-stories and prevented the development of various projects, including apartment buildings and solar plants, since the 1960s.
The community was abandoned over a two-year period from 1989 to 1991, after soil testing revealed that the town was built on unstable Leda clay, a type of subsoil which can liquefy under stress, and was consequently in danger of experiencing a landslide similar to the one that destroyed the town of Saint-Jean-Vianney, Quebec in 1971.
The mass of ice from the continental ice sheets had depressed the rock beneath it over millennia. At the end of the last glacial period, while the rock was still depressed, the Saint Lawrence and Ottawa River valleys, as well as modern Lake Champlain, at that time Lake Vermont, were below sea level and flooded with rising worldwide sea levels, once the ice no longer prevented the ocean from ...
Ottawa River Stromatolite Bed, near the Champlain Bridge (Ottawa), with the Ottawa skyline in the background [240] Large deposits of a material commonly known as Leda clay also formed. These deposits become highly unstable after heavy rains. Numerous landslides have occurred as a result.
The Canadian Museum of Nature (French: Musée canadien de la nature; CMN) is a national natural history museum based in Canada's National Capital Region.The museum's exhibitions and public programs are housed in the Victoria Memorial Museum Building, a 18,910-square-metre structure (203,500 sq ft) in Ottawa, Ontario.
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The 1908 landslide at Notre-Dame-de-la-Salette and the earlier 1903 clay landslide at Leda both occurred on this river. At one time, the river was used to transport logs downstream to sawmills located near the river's mouth. In 1928, a paper mill was built near the mouth of the river. On December 18, 1998, this mill was bought from Industries ...