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Nearly as old as the Earth, at 4 billion years of age.

Sorry no the Canadian Rockies are not 4 billion years old. The Appalachian Mountains in Eastern Canada and United States are the oldest mountain range on earth and they only date 540million to 1.1billion years old. I have no idea how old the Rockies are, but I DO know they are "young" mountain range.

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12y ago

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16 years

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15y ago
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Q: How old is the Colorado Rockies?
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