This 2010 BBC video says about itself:
11 August 2010
Translated from Leiden University in the Netherlands, 25 August 2015:
Original inhabitants of French Guiana were not nomads
Archaeologically, French Guiana is still largely unexplored. “The work is hard,” says Martijn van den Bel, “but all you find is brand new. For example, that Indians really lived in the so-called virgin forest.” PhD on September 2.
Finds from unknown epoch
Van den Bel focused on the period from 3000 BC. until the present time. He discovered that French Guiana had already residents then and also that these Indians were not so primitive. He and his colleagues found shards which could be reconstructed into open, round bowls of 30 cm high with powdered quartz stone mixed into the baking clay. They can be dated to the Early Ceramic period (2500 BC.). “There was nothing known about that time,” says Van den Bel.
Parts of the Amazon previously thought to have been almost uninhabited were really home to thriving populations of up to a million people, new research shows: here.