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Weather such as wind and rain
- The mountains of the Canadian Shield were subsequently eroded by weather such as wind and rain. Comparable to sandpaper on wood, these forces slowly wore down the mountains, so that by about 800 million years ago, the low-relief surface of the Shield had been created.
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How Was the Canadian Shield Formed? The Canadian Shield formed over 3 billion years through processes such as plate tectonics, erosion and glaciation. Plate tectonics refers to the movement and collision of the Earth’s outer crust. When these crustal plates collide they may weld together, forming larger landmasses.
Jul 6, 2021 · The mountains of the Canadian Shield were eroded. Erosion happens when wind and rain wear down rocks, land, and earth. The Canadian Shield continues to be changed by environmental forces every day.
The kimberlite pipes in which the diamonds are found are closely associated with cratons, which provide the deep lithospheric mantle required to stabilize diamond as a mineral. The kimberlite eruptions then bring the diamonds from over 150 kilometres (93 mi) depth to the surface.
The Canadian Shield constitutes the largest mass of exposed Precambrian rock on the face of Earth. The region, as a whole, is composed of ancient crystalline rocks whose complex structure attests to a long history of uplift and depression, mountain building (orogeny), and erosion.
- The Editors of Encyclopaedia Britannica
May 10, 2019 · Through the ages, winds, rain, and ice eroded the shield’s soaring mountains (some of them thousands of metres higher than present-day Everest) down to a low plateau of rolling hills. Vast quantities of sediment were deposited, layer after layer, in the shallow waters surrounding the plateau.
The Canadian Shield was formed From tectonic plate movement and collision, when the tectonic plates collided it caused the earth's crust to deform which is called “orogeny”. Orogenies cause mountain ranges, the Canadian shield formed through multiple orogenies it was once covered in mountains.
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Born of the cataclysmic convulsions of the earth after it had solidified from a molten mass, the Canadian Shield dates back at least 21/2 billion years. It has since been wrung by contractions of the earth’s crust, jolted by subterranean upheavals, crushed and clawed by Ice Ages, and eroded by the weather of countless centuries.
