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Cretaceous
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Rocks
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Cretaceous Rocks
of Manitoba

Layer upon layer of sediment, which eventually hardened into sedimentary rock, was deposited over Manitoba during Cretaceous time. These layered deposits formed mainly at the bottom of the Western Interior Seaway. They have since been eroded away, except in the southwestern part of the province. Cretaceous rock can be seen mainly along the Manitoba Escarpment, where it isn't covered by younger rock and sediment.

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