History of North America

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How was rocky mountains formed?

The Rocky Mountains were formed as a result of the collision between the North American Plate and the Farallon Plate. This collision began about 75 million years ago and lasted for about 20 million years. As the Farallon Plate was subducted beneath the North American Plate, it melted and rose to the surface, creating volcanoes and plutons. The weight of the subducting plate also caused the North American Plate to buckle and form a series of mountain ranges, including the Rocky Mountains.

The Rocky Mountains are made up of a variety of rock types, including granite, gneiss, and schist. These rocks were formed from the magma that rose from the subducted Farallon Plate. The Rocky Mountains are also home to a variety of mineral deposits, including copper, gold, silver, and lead.

The Rocky Mountains have been a major barrier to transportation and communication in North America. However, they have also provided a rich source of natural resources and a beautiful landscape for tourism and recreation.

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