Toward the end of the Mesozoic era, the ______orogeny formed the southern ranges of the Rocky Mountains.

Name: Toward the end of the Mesozoic era, the ______orogeny formed the southern ranges of the Rocky Mountains.
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The Laramide orogeny occurred during the Late Cretaceous period and formed the southern ranges of the Rocky Mountains. The other options, Blount, Coloradan, and Sevier, refer to other mountain-building events that occurred in different regions and/or time periods.

Toward the End of the Mesozoic Era, the ______Orogeny Formed