Rocky Mountains vs. Pangaea: The Rockies Are Much Younger

No. The Rocky Mountains are not older than Pangaea.

• Pangaea: Supercontinent existed ~335–175 million years ago (Late Paleozoic to Early Mesozoic).
• Rocky Mountains: Formed during the Laramide orogeny ~80–55 million years ago (Late Cretaceous to Paleogene).

The Rockies rose over 100 million years after Pangaea began breaking apart. They are a product of post‑Pangaea tectonics, specifically the subduction of the Farallon Plate under North America.