Subduction Zone
Regular Member
Oh we know that it is millions of years older than that. And your upper limit is a bit high. It would be wise to try to learn the difference between mere belief and knowledge.If some think the Grand Canyon is 70 million years old, I won't dispute that.
But what I will dispute is anyone who says that the Grand Canyon existed prior to around 2345 BC.
Give or take a few years.
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