What major geographic event took place during the mesozoic era?

Answer;

The geographic events during mesozoic Era;

-formation of the Rocky Mountains begins

-Innuitian Mountains formed

-shallow seas in the interior of North America at times

Explanation;

-This Era is the second of Earth’s three major geologic eras of Phanerozoic time.

-Mesozoic Era began 252.2 million years ago, following the conclusion of the Paleozoic Era, and ended 66 million years ago, at the dawn of the Cenozoic Era.