Eugene Stockton suggests that the central Blue Mountains from Springwood to the base of Boddington Hill at Wentworth Falls, together with the ridges radiating from these areas, is a spiritual and ceremonial area because of the large concentration of art and ceremonial sites and low concentration of occupational sites visited only periodically for one of these purposes. Conversely, living areas near the more abundant food supply areas have low concentrations of art and ceremonial sites such as the Kanangra Plateau. J. Smith, ‘Gundungurra Country’, PhD thesis, 2008, p. 621.