Appalachian Mountain Range
When did the Appalachian Mountain Range begin to form? a
date or time in history would be helpful.
These mountains formed with the collision of the early Africa continent
into North America about 360 million years ago. This huge collision
rippled the land well into Missouri, but created the App. mountains. They
were much taller at first, but erosion has taken a toll on this chain and
they are well on their way of being worn away.
You need to look this up in a library. the information is well presented
in a number of references.
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Update: June 2012