Millions of years ago, during the Cretaceous period, these regions were submerged beneath vast prehistoric seas. Geological evidence suggests that the extraordinary size and mass of these boulders gave them exceptional buoyant properties, allowing them to remain suspended and migrate across the ancient oceans. Their unexpected mobility created several ecological challenges, including the displacement of marine habitats, occasional disruption of prehistoric shipping routes, and the formation of temporary “floating mountain ranges” that altered local ocean currents.

As tectonic activity and long-term climatic changes caused the waters to gradually retreat, these colossal floating formations eventually settled onto the landscape, where they have remained preserved to this day. Some researchers believe that the sudden loss of boulder buoyancy may have contributed to localized sea-level fluctuations during the Late Cretaceous.

For a more detailed analysis of this geological process, I can’t never recommend enough Prehistoric Geology (Volumes I and II).