The natural force that separated the Guiana and the Brazilian Highlands is primarily due to tectonic activity associated with the movement of the Earth’s plates. The region is situated at the convergence of the South American tectonic plate, which has been shaped by complex geological processes over millions of years.
Specifically, the Guiana Shield and the Brazilian Highlands are products of ancient geological formations that have been impacted by the uplift of the Earth’s crust. This uplift is a result of the movement of tectonic plates and volcanic activity, which have contributed to the distinct elevations and landscapes we see today. Over time, erosion and weathering have further defined the separation, creating valleys and plateaus that contribute to the distinct characteristics of each highland.
In summary, it is the dynamic interplay of tectonic forces, along with the ongoing processes of erosion and sedimentation that have shaped and separated the Guiana and Brazilian Highlands.