Why were the ocean fossils found on top of the rocky mountains?

Ocean fossils found on top of the Rocky Mountains indicate that these mountains were once underwater. Millions of years ago, tectonic plate movements caused the ocean floor to uplift, forming the mountains we see today. This geological process, known as orogeny, often results in marine sediments being elevated to high altitudes, revealing the ancient marine environments that existed in those areas. Such findings provide crucial evidence of the Earth's dynamic history and the shifts in its geological features over time.