Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Rock Drawings in Valcamonica' has mentioned 'Chalcolithic' in the following places:
Occurrence Sentence Text Source
Proto-Camunian period Final Paleolithic,Epipaleolithic and Proto-Neolithic The Camunian I Neolithic The Camunian II Neolithic The Camunian III Chalcolithic, Early and Middle Bronze Age The Camunian IV The late and final Bronze Age, Iron Age
During the Copper Age (or Chalcolithic period, the 3rd millennium BC approximately-3300-2500 BC[5]), new symbols appeared, documenting the emergence of the wheel, the wagon and the first forms of metallurgy.