Which era saw the Rockies finish forming?

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Multiple Choice

Which era saw the Rockies finish forming?

Explanation:
The Rockies finished forming mainly during the Cenozoic era. They were uplifted most strongly in the late Mesozoic to early Paleogene time by the Laramide orogeny, but the major final shaping and taller, more rugged profile that we recognize today occurred as the Cenozoic began and continued into its early stages. So while the process started earlier, the completing phase falls in the Cenozoic, making it the best fit.

The Rockies finished forming mainly during the Cenozoic era. They were uplifted most strongly in the late Mesozoic to early Paleogene time by the Laramide orogeny, but the major final shaping and taller, more rugged profile that we recognize today occurred as the Cenozoic began and continued into its early stages. So while the process started earlier, the completing phase falls in the Cenozoic, making it the best fit.

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