Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Chiribiquete National Park – “The Maloca of the Jaguar”' has mentioned 'Petroglyphs' in the following places:
Occurrence Sentence Text Source
[3][4][5][7] More than 600,000 traces of over 75,000 petroglyphs and pictographs have been discovered on the walls of 60 rock shelters in Serranxc3xada de Chiribiquete, the oldest of which could date back to about 20,000 years BP.