The below text and images are taken and adapted from Grahame L. Walsh’s 2000 publication, Bradshaw Art of the Kimberley.
Superimposition has been the most important single tool throughout the long quest to establish a basic sequence for Kimberley rock art.
From a scientific viewpoint, the establishment of a basic sequence is a primary objective, as it provides a platform from which ongoing stylistic and technological studies can be structured. Its secondary role is to increase the value which the graphic records of the rock art might have for archaeological, palaeobotanical and pelaeo-environmental studies. There seem to be three primary ‘intent and purpose’ classifications in which examples of superimposition can be placed:
Casual — unintentional, Deliberate — positive, or Deliberate — negative.